WO2019208742A1 - Lifter device - Google Patents

Lifter device Download PDF

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Publication number
WO2019208742A1
WO2019208742A1 PCT/JP2019/017817 JP2019017817W WO2019208742A1 WO 2019208742 A1 WO2019208742 A1 WO 2019208742A1 JP 2019017817 W JP2019017817 W JP 2019017817W WO 2019208742 A1 WO2019208742 A1 WO 2019208742A1
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WO
WIPO (PCT)
Prior art keywords
rotation
gear
lock
pinion gear
feed
Prior art date
Application number
PCT/JP2019/017817
Other languages
French (fr)
Japanese (ja)
Inventor
佑介 梶野
康明 鈴木
Original Assignee
トヨタ紡織株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by トヨタ紡織株式会社 filed Critical トヨタ紡織株式会社
Publication of WO2019208742A1 publication Critical patent/WO2019208742A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60NSEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable

Definitions

  • the present invention relates to a lifter device. More specifically, a pinion gear that meshes with an input gear of a link mechanism that moves the seat up and down, and a rotation that controls the rotation of the pinion gear by being connected to an operation handle and a pinion gear that are operated in a corresponding rotation direction when the seat is moved up and down. And a control device.
  • Patent Document 1 a configuration in which a lifter device capable of adjusting a seat cushion height of a seat cushion is known in a vehicle seat.
  • the lifter device transmits the operation movement amount as the feed rotation movement amount of the gear by raising or lowering the operation handle so that the seat surface height is raised or lowered by a certain amount. It has become.
  • the lifter device unlocks the operation of the operation handle so that the rotation of the gear is locked at that position, and the operation handle is returned to the neutral position before the operation, and can be operated again. It will be returned to the state.
  • the above-mentioned feed rotation of the gear accompanying the operation of the operation handle is performed by pushing the feed pole meshed with the gear in the operation direction of the operation handle.
  • the gear rotation is locked by a pair of symmetrical lock pawls meshed with the gear.
  • a ratchet type meshing structure that escapes rotation in the direction but bites in the reverse direction, so that the feed rotation and return rotation of the gear are stopped at the position where the operation handle is released. ing.
  • the feed pole that performs the feed rotation of the gear described above is composed of a pair of symmetrical structures, like the lock pole described above, so as to allow the movement returned to the neutral position when the operation handle is released.
  • one is disengaged from the gear, and the other is engaged with the gear so as to be able to transmit power in the feed direction, but has a ratchet type meshing structure that escapes rotation in the reverse direction.
  • the lifter device comprises: A pinion gear meshing with an input gear of a link mechanism that moves the seat up and down; A rotation control device that is arranged so as to connect between an operation handle that is operated in a corresponding rotation direction when the seat is moved up and down and the pinion gear, and that controls the rotation of the pinion gear; A lifter device comprising a base that rotatably supports the pinion gear, The rotation control device is An input member coupled to the operation handle and rotated about a rotation axis of the pinion gear by a rotation operation of the operation handle; A feed unit coupled to the input member and the pinion gear to transmit the rotation of the input member to the pinion gear as a feed rotation; A lock portion that stops rotation of the pinion gear that is fed and rotated by the feed portion with respect to the base; The feeding part is A feed pole provided on the input member, an internal gear that rotates integrally with the input member by meshing in a state where the feed pole is biased, and a pinion gear that
  • the lock part is A plurality of lock poles that stop the rotation of the rotating member by being meshed in a state of being biased with respect to a base gear that is provided on the rotating member and formed on the base;
  • the feed pole and the lock pole are When a rotation in one direction is input from the input member, it engages with each meshing object so that power can be transmitted. When a rotation in the other direction is input from the input member, power cannot be transmitted to each meshing object.
  • the internal gear is The rotating member in the operating direction among the plurality of lock poles is rotated in one of the one direction and the other direction until the engaging portion is engaged with the rotating member.
  • a part of the lock pole for stopping the rotation of the base and the lock release part for releasing the meshing with the base gear When the feed rotation of the rotating member via the internal gear is stopped, when there is a reverse input in the direction of further advancement of the feed rotation from the pinion gear, due to the progress of the rotation of the rotating member by the reverse input, And a cancel structure for stopping the release of the engagement between the part of the lock poles and the base gear by the lock release portion.
  • the reverse input in the direction in which the feed rotation accompanying the gravity action of the seat further proceeds from the pinion gear. If there is, the rotation of the rotating member further proceeds due to the reverse input, so that the engagement between the lock pole and the base gear is released (that is, the rotating member can be rotated by the function of the lock releasing portion). Is canceled and the lock pole is engaged with the base gear. As a result, further rotation of the rotating member (that is, slippage due to reverse input) is suppressed.
  • the slip in the feed rotation direction with respect to the base gear of the lock pole provided on the rotating member integrated with the pinion gear (and consequently the sliding of the seat surface height) can be appropriately regulated.
  • the internal gear and the base gear have internal gears having the same number of teeth or an integral multiple of the other side.
  • the pinion gear can be efficiently fed and rotated without loss with respect to the feed rotation of the internal gear accompanying the rotation operation of the operation handle.
  • FIG. 1 is an outer side view illustrating a schematic configuration of the lifter device according to the first embodiment.
  • FIG. 2 is a side view of the structure on the outer side as seen from the inside of the seat.
  • FIG. 3 is an exploded perspective view showing a state in which the operation handle and the rotation control device are removed from the seat frame.
  • FIG. 4 is a perspective view of the rotation control device viewed from the outside of the seat.
  • FIG. 5 is a perspective view of the rotation control device viewed from the inside of the seat.
  • FIG. 6 is a front view of the rotation control device viewed from the outside of the seat.
  • 7 is a cross-sectional view taken along line VII-VII in FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG.
  • FIG. 9 is an exploded perspective view of the rotation control device viewed from the outside of the seat.
  • 10 is an exploded perspective view showing an assembled state between some of the components shown in FIG.
  • FIG. 11 is an exploded perspective view showing a further assembled state between some of the components shown in FIG. 12 is an exploded perspective view showing a further assembled state between some of the components shown in FIG.
  • FIG. 13 is an exploded perspective view of the rotation control device viewed from the inside of the seat.
  • 14 is an exploded perspective view showing an assembled state between some of the components shown in FIG.
  • FIG. 15 is an exploded perspective view showing a further assembled state between some of the components shown in FIG.
  • FIG. 16 is a state diagram of the feeding unit of the rotation control device when the operation handle is in the neutral position.
  • FIG. 17 is a state diagram of the lock portion.
  • FIG. 18 is a state diagram of the feeding portion when the operation handle is pushed down from the neutral position to the middle position.
  • FIG. 19 is a state diagram of the lock portion.
  • FIG. 20 is a state diagram of the feeding portion when the operation handle is pushed down from the neutral position to the full stroke position.
  • FIG. 21 is a state diagram of the lock portion.
  • FIG. 22 is a state diagram of the feeding unit when the pinion gear is rotated forward by the gravitational action received from the seat side from the state in which the operation handle is pushed down.
  • FIG. 23 is a state diagram of the lock portion.
  • FIG. 24 is a state diagram of the feeding portion when the operation handle is returned from the push-down operation state to the neutral position.
  • FIG. 24 is a state diagram of the feeding portion when the operation handle is returned from the push-down operation state to the neutral position.
  • FIG. 25 is a state diagram of the lock portion.
  • FIG. 26 is a state diagram of the feeding unit when the operation handle is pulled up from the neutral position to the middle position.
  • FIG. 27 is a state diagram of the lock portion.
  • FIG. 28 is a state diagram in which the rotation of the pinion gear in the push-down operation direction is locked by the stopper.
  • FIG. 29 is a state diagram in which the rotation of the pinion gear in the pulling operation direction is locked by the stopper.
  • ⁇ About the schematic configuration of the lifter device 10> 1 to 3 show an automotive seat 1 (hereinafter simply referred to as “seat”) to which a lifter device 10 according to an embodiment of the present invention is applied.
  • wore the motor vehicle 1 with the arrow is shown. In the following description, the description regarding the direction is made based on this direction.
  • the seat 1 is provided with a seat back 3 that forms a backrest at the rear portion of the seat cushion 2 that forms a seat, and the seat back 3 is rotatable in the front-rear direction with respect to the seat cushion 2.
  • the seat cushion 2 includes a lifter device 10 and a seat slide device 8 at a lower portion, and is fixed to a vehicle floor 4 via a bracket 7.
  • the seat slide device 8 is a well-known one, and a pair of left and right upper rails 6 are coupled to a pair of left and right lower rails 5 extending in the front and rear direction so as to be slidable in the front and rear directions.
  • the left and right lower rails 5 are fixedly supported by a pair of front and rear brackets 7 fixed to the floor 4.
  • a lifter device 10 is provided on the left and right upper rails 6.
  • the lifter device 10 includes a base member 14 fixed on each upper rail 6, and a plurality of link members 11 rotatably coupled to the front and rear end portions of each upper rail 6.
  • a side frame 13 that is a skeleton member of the cushion 2, a base member 14, and each link member 11 constitute a link mechanism 12 that is a four-bar link.
  • the rear link 11 b on the right rear side includes a sector gear 16 (corresponding to the “input gear” of the present invention) and is rotated in the front-rear direction by the pinion gear 18 of the rotation control device 21. It is configured to be.
  • the rotation axis of the right rear rear link 11b with respect to the side frame 13 is constituted by a torque rod 17, and the left rear rear link (not shown) is also synchronized with the rear link 11b via the torque rod 17. It is configured to rotate.
  • the side frame 13 is provided with a through hole 13a for inserting the pinion gear 18, and the rotation control device 21 is fixed to the right side wall of the side frame 13 so that the pinion gear 18 is inserted into the through hole 13a.
  • the rotation control device 21 can be rotated in the forward and reverse directions by an operation handle 20 that extends in the front-rear direction on the right side portion of the seat cushion 2.
  • the rotation control device 21 rotates in the direction in which the rear link 11b is raised from the base member 14, and when the operation handle 20 is rotated downward from the neutral position, the rotation control device. 21 rotates in a direction in which the rear link 11b is lowered on the base member 14. Due to the configuration of the four-bar link described above, the front link 11a also rotates according to the rotation of the rear link 11b, and the height position of the seat cushion 2 with respect to the floor 4 is adjusted according to the operation of the operation handle 20.
  • ⁇ Configuration of rotation control device 21> 4 to 6 show the rotation control device 21 removed from the seat cushion 2.
  • the configuration of the rotation control device 21 will be described with reference to FIGS. 4 to 15 will be referred to as appropriate for the reference numerals of the components of the rotation control device 21 described below.
  • the rotation control device 21 allows the rotation shaft 22 to pass through a center hole 23c of a support member 23 (corresponding to the “base” of the present invention) as a base member so that the pinion gear 18 protrudes from the left side surface of the support member 23. It is assembled.
  • the support member 23 is fixed to the side frame 13 with the pinion gear 18 passing through the through hole 13 a of the side frame 13.
  • the right side surface of the support member 23 is stamped and formed on the left side so as to accommodate a disk-shaped lock plate 31 (corresponding to the “rotating member” of the present invention) to form a guide recess 23b. It is said that.
  • Inner teeth 34 are formed on the inner peripheral surface of the guide recess 23b to engage with poles 32 and 33 (corresponding to "lock pole” of the present invention) which will be described later.
  • a spline hole 31 b is formed at the center of the lock plate 31 so as to mesh with the spline 22 b of the rotary shaft 22. Therefore, the lock plate 31 is rotated synchronously with the rotary shaft 22.
  • the outer peripheral portion of the right side surface of the lock plate 31 is formed with one protrusion 31d protruding in the vertical direction and two protrusions 31e protruding in the front-back direction.
  • the projections 31e are fitted with through holes 32a and 33a of the poles 32 and 33 so that the poles 32 and 33 can swing around the projections 31e.
  • each projection 31d is fitted with a winding portion 35a of a torsion spring 35, and each end portion 35b of the torsion spring 35 is engaged with each of the poles 32 and 33, and locks each of the poles 32 and 33.
  • the plate 31 is biased toward the outer peripheral side. Therefore, the engaging end portions 32 c and 33 c forming the external teeth of the poles 32 and 33 are always engaged with the internal teeth 34 of the support member 23.
  • FIG. 11 shows a state in which the lock plate 31 connected to the poles 32 and 33 is assembled to the support member 23 as described above.
  • a plate-like outer plate 41 constituting an outer piece of the input member N that is coupled to the operation handle 20 and is rotated is provided on the right side surface of the cover 24 formed in a container shape that swells to the right as a whole. Yes.
  • a projecting pin 25b that protrudes in a round bar shape from the center of the substantially cylindrical shaft member 25 to the right is inserted into the through hole 24e at the center of the cover 24 and the center hole 41b of the outer plate 41 from the left side.
  • a pair of arcuate openings 24a formed in the cover 24 and a pair of arcuate through holes 41a formed in the outer plate 41 are plate-like members that constitute the inner piece of the input member N described above.
  • a pair of arms 53a formed on the inner plate 53 is inserted from the left side.
  • the pair of arms 53a are inserted into the corresponding through holes 41a of the outer plate 41 to a position where the flange portion 25c of the shaft member 25 and the cover 24 are sandwiched in the left-right direction between the inner plate 53 and the outer plate 41, At that position (clamping position), the previous protruding portion inserted into the corresponding through hole 41a is welded and joined to the peripheral portion on the outer peripheral side of the corresponding through hole 41a of the outer plate 41 (welded portion W: (See FIG. 8).
  • the cover 24 and the outer plate 41 are slidably coupled to each other via the shaft member 25 by the above coupling.
  • an engagement piece 42 is formed to bend to the left side, and the engagement piece 42 is aligned with the inner peripheral side of the engagement piece 24b formed to protrude to the right side of the cover 24.
  • An end 43a of the torsion spring 43 is disposed so as to wrap around the engaging pieces 42 and 24b. Therefore, when the outer plate 41 is rotated by the operation handle 20, the engagement piece 42 moves so as to be separated from the engagement piece 24 b in the circumferential direction, but when the rotation operation is released, the torsion spring 43 of the torsion spring 43 is moved. Due to the urging force, the engagement piece 42 and the engagement piece 24b are in a position where they overlap each other in the circumferential direction, and the outer plate 41 is returned to the position before the rotation operation.
  • an inner plate 53 and a cam member 54 are provided on the left side of the cover 24 so as to be accommodated in the container-like cover 24.
  • the cover 24 is fixed to the support member 23 by sandwiching these components together with the lock plate 31 and the rotation transmission plate 36 (corresponding to the “internal gear” of the present invention).
  • the leg portion 24d of the cover 24 is fixed to the through hole 23a of the support member 23 with a rivet (not shown).
  • the cam member 54 is generally formed in a ring shape, is provided with four pins 54b on the right side surface, and is formed with a cam projection 54a protruding above the inner periphery of the ring shape.
  • Each pin 54 b of the cam member 54 is fixed to the inside of the cover 24 by fitting into the through hole of the protruding piece 24 c of the cover 24.
  • the inner plate 53 includes arms 53a extending rightward on the front and rear portions, and each arm 53a passes through the corresponding opening 24a of the cover 24 and passes through the corresponding through hole 41a of the outer plate 41 as described above. is doing.
  • Each opening 24a of the cover 24 has a longer circumferential length than each arm 53a, and each corresponding through hole 41a of the outer plate 41 has a circumferential length substantially the same as each arm 53a. is doing. Therefore, the inner plate 53 is rotated integrally with the outer plate 41, and each circumferential rotation operation is engaged at a position where each arm 53 a hits the circumferential end of each opening 24 a of the cover 24. It has come to be stopped.
  • a pair of feed claws 52 fits the hinge portions 52 b of the feed claws 52 into the corresponding through holes 53 b of the inner plate 53. Thus, they are coupled so as to freely swing.
  • a substantially disc-shaped rotation transmission plate 36 is provided on the left side of the inner plate 53, and the rotation transmission plate 36 is sandwiched between the inner plate 53 and the lock plate 31.
  • Four disk-shaped engagement holes 36a are formed in the disk surface portion of the rotation transmission plate 36 corresponding to the poles 32 and 33.
  • the pins 32b and 33b of the poles 32 and 33 are inserted into the holes 36a so as to be engageable in the circumferential direction.
  • two elliptical engagement holes 36b are formed in the disk surface portion of the rotation transmission plate 36 corresponding to each protrusion 31d.
  • Each protrusion 31d is inserted into the hole 36b so as to be engageable in the circumferential direction.
  • torsion springs 37 and 55 are provided around the center hole 36d.
  • the end portion 37a of the torsion spring 37 is bent to the left side and is inserted across the long hole 36c of the rotation transmission plate 36 and the long hole 31c of the lock plate 31 and extends in the circumferential direction across the long holes 36c and 31c. It is provided in a state that exerts an urging force in both directions.
  • the torsion spring 37 maintains the rotation angle of the rotation transmission plate 36 with respect to the lock plate 31 in the neutral position by the biasing force.
  • the end 55a of the torsion spring 55 applies a biasing force to the protrusion 52d of the feed claw 52 from the inside in the radial direction to press each feed claw 52 to the outer peripheral side.
  • a projection 55 b that protrudes toward the right side is formed at the center of the torsion spring 55.
  • the protrusion 55b is inserted into and engaged with an engagement hole 53c formed at the center of the lower end of the inner plate 53. Therefore, the protrusion 52 d of the feed claw 52 is constantly pressed by the end 55 a of the torsion spring 55, and the engagement end 52 a is engaged with the internal teeth 51 of the rotation transmission plate 36.
  • the internal teeth 51 of the rotation transmission plate 36 and the internal teeth 34 of the support member 23 are configured to have the same number of teeth.
  • FIG. 11 and 15 show the state in which the outer plate 41, the inner plate 53, the cam member 54, the feed claw 52, the internal teeth 51 of the rotation transmission plate 36, and the torsion spring 55 are assembled to the cover 24 as described above.
  • FIG. 12 shows a state where the rotation transmission plate 36 is assembled on the lock plate 31. 11 and 12 do not show the assembly procedure of the rotation control device 21, but the spline 22c of the rotary shaft 22 is finally fitted into the spline hole 25a of the shaft member 25, and the cover 24 is further supported by the support member. Assembling as the rotation control device 21 is completed.
  • the spline hole 25a of the shaft member 25 is formed at the left end portion of the shaft member 25 that is exposed through the center hole 53d (see FIG. 8) of the inner plate 53 from the right side.
  • the feed claw 52, the rotation transmission plate 36, and the lock which are connected between the outer plate 41 and the pinion gear 18 and transmit the rotation of the outer plate 41 to the pinion gear 18 as a feed rotation.
  • a power transmission system composed of the plate 31 is configured as the feeding portion A.
  • a mechanism portion including the respective poles 32 and 33 for stopping the rotation of the pinion gear 18 fed and rotated by the feed portion A with respect to the support member 23 is configured as a lock portion B.
  • a concentric outer peripheral surface 22a having no gear shape is formed between the pinion gear 18 of the rotating shaft 22 and the spline 22b, and the rotating shaft side protrusion 63 is formed on the outer peripheral side of the specific angular position of the outer peripheral surface 22a. Is formed to project in the radial direction.
  • the rotation shaft side protrusion 63 is positioned so as to be exposed on the right side surface of the guide recess 23 b of the support member 23.
  • an arc-shaped support member side protrusion 61 is formed by stamping.
  • the lock plate 31 is formed so as to form a sliding surface portion 31a concentric with the spline hole 31b.
  • the engaging piece 62 is arranged so as to slide in the gap between the inner periphery of the sliding surface portion 31 a and the outer peripheral surface 22 a of the rotating shaft 22.
  • the rotation shaft side protrusion 63 sandwiches the engagement piece 62 and the support member side protrusion as shown in FIG. Abutting on the end of 61, the rotation of the rotary shaft 22 is stopped.
  • the rotary shaft side protrusion 63 is located at the opposite end of the support member side protrusion 61 with the engagement piece 62 interposed therebetween. A further portion of the rotary shaft 22 is stopped.
  • 16 and 17 show a neutral position in which the operation handle 20 is not operated and the outer plate 41 and the inner plate 53 are not rotated.
  • the feed claw 52 is in a state where the engagement end portion 52 a forming its outer teeth is engaged with the inner teeth 51 of the rotation transmission plate 36 by the urging of the torsion spring 55.
  • the pawls 32 and 33 are in a state in which the engaging end portions 32 c and 33 c are engaged with the internal teeth 34 of the support member 23 by the urging of the torsion springs 35. Therefore, the rotation of the lock plate 31 is locked through the engagement of the poles 32 and 33, and the height of the seat 1 is not changed to the ascending side or the descending side.
  • the four engagement holes 36a formed in the rotation transmission plate 36 described above are each formed in a substantially trapezoidal shape that narrows the hole width in the circumferential direction from the inner side to the outer side in the radial direction.
  • the four engagement holes 36a described above are arranged so that each of the pawls 32, when the rotation transmission plate 36 is in the neutral position by the urging action of the torsion spring 37 with respect to the lock plate 31.
  • 33 pins 32b and 33b (round pins) are positioned as follows.
  • the two engagement holes 36a into which the pins 32b of the poles 32 are inserted are biased in the circumferential direction with the inclined side surfaces facing the pins 32b in the circumferential direction approaching the clockwise direction in the figure. It is supposed to be positioned in the state. Further, the two engaging holes 36a into which the pins 33b of the poles 33 are inserted are arranged in the circumferential direction, with the inclined side surfaces facing the respective pins 33b facing in the circumferential direction approaching the counterclockwise direction shown in the figure. It can be positioned in a biased state.
  • the rotation transmission plate 36 is rotated from the above-described neutral position to the shape shown in FIGS. 18 to 19, so that the two engagement pins into which the pins 33b of the respective poles 33 are inserted.
  • the inclined side surface of the joint hole 36a is brought into contact with these two pins 33b, and the pins 33b are pushed and slid radially inward along the inclined side surface of each engaging hole 36a as the rotation proceeds,
  • the engagement end portions 33c of the respective poles 33 are removed from the internal teeth 34 of the support member 23 while leaving the engagement end portions 32c of the other two poles 32 engaged with the internal teeth 34 of the support member 23. It is designed to rotate.
  • the rotation transmission plate 36 is rotated from the above-described neutral position to the shape shown in FIGS. 26 to 27 (in the opposite direction), so that the two engagement holes 36a into which the pins 32b of the respective poles 32 are inserted. While the inclined side surface is brought into contact with these two pins 32b, the other two pins 32b are pushed and slid radially inward along the inclined side surface of each engagement hole 36a as the rotation proceeds.
  • the engagement end portion 32c of each pole 32 is rotated so as to be disengaged from the inner teeth 34 of the support member 23 while leaving the engagement end portion 33c of the pole 33 engaged with the inner teeth 34 of the support member 23. It has become.
  • each of the above-described poles 32 and 33 has their engagement ends 32 c and 33 c meshed with the inner teeth 34 of the support member 23.
  • the poles 32 and 33 are positioned at the intermediate portion in the radial direction (radial direction) between the protrusion 31e that is the rotation center of the lock plate 31 with respect to the lock plate 31 and the tooth tip of the internal tooth 34. Therefore, each of the poles 32 and 33 can be efficiently rotated radially inward with respect to the rotational movement amount of the rotation transmission plate 36 to be disengaged from the internal teeth 34 of the support member 23. (See FIGS. 19 and 27). Therefore, the stroke required for the unlocking operation of the poles 32 and 33 accompanying the operation of the operation handle 20 can be shortened.
  • the engagement holes 36a of the rotation transmission plate 36 for pushing the pins 32b and 33b of the poles 32 and 33 in the rotation direction are respectively connected to the pins 32b and 33b (virtual And the inner teeth on the tooth surfaces farthest from the center of rotation (protrusion 31e) of the engaging ends 32c, 33c forming the outer teeth of the poles 32, 33.
  • the inclined shape of each inclined side surface is set so that the angle ⁇ formed by the contact surface with the 34 tooth surfaces is larger than the friction angle defined between these tooth surfaces.
  • the setting of the angle ⁇ is also applied to the tooth surfaces other than the tooth surfaces farthest from the rotation center (projection 31e) among the engaging end portions 32c and 33c forming the external teeth of the poles 32 and 33. Can be done. Further, as shown in FIG. 17, the engaging end portions 32c and 33c forming the external teeth of the respective poles 32 and 33 have a contact surface method of the tooth surfaces of the internal teeth 34 of the support member 23 with which the tooth surfaces contact.
  • the tooth surface shape is such that the angle ⁇ formed between the line and the line connecting the contact point and the rotation center (projection 31e) of each pole 32, 33 is smaller than the friction angle defined between these tooth surfaces. Is set.
  • ⁇ Operation of rotation control device 21 (full stroke operation of operation handle 20)> 20 and 21 show a state where the operation handle 20 is pushed down from the neutral position to the full stroke position.
  • the full stroke position is determined by the arm 53a of the inner plate 53 coming into contact with the circumferential end of the opening 24a of the cover 24.
  • the rotation of the inner plate 53 and each feed claw 52 proceeds as compared with the state of FIG. 18, and the rotation angle of the rotation transmission plate 36 is increased by the front feed claw 52.
  • the structure includes a cancel structure C that releases the push-out state of each pole 33 that stops the rotation in the direction by each engagement hole 36a as the rotation of the plate 31 proceeds.
  • a certain amount of braking is applied to the rotation of the rotating shaft 22. It is desirable to suppress the rotation shaft 22 from being rotated by the gravity of the sheet 1 by using the above.
  • the rear feed claw 52 returns to a state in which the engagement end portion 52 a is engaged with the inner teeth 51 of the rotation transmission plate 36.
  • the front feed claw 52 slides so that the engagement end portion 52a slides on the inner teeth 51 of the rotation transmission plate 36 until the inner plate 53 is returned to the neutral position.
  • 26 and 27 show a state where the operation handle 20 is pulled up from the neutral position to the middle position.
  • the inner plate 53 is rotated in the direction of the arrow by the rotation of the outer plate 41.
  • each feed claw 52 is moved in the same direction. Therefore, the engagement end portion 52a of the rear feed claw 52 transmits a force to the internal teeth 51 of the rotation transmission plate 36, and rotates the rotation transmission plate 36 in the arrow direction.
  • the engaging end 52a of the front feed claw 52 is not engaged with the internal teeth 51 of the rotation transmission plate 36.
  • the lifter device 10 of this embodiment is configured as follows. That is, the lifter device (10) has a pinion gear (18) that meshes with the input gear (16) of the link mechanism (12) that moves the seat (1) up and down, and a rotation that corresponds to when the seat (1) moves up and down.
  • a rotation control device (21) for controlling the rotation of the pinion gear (18) disposed so as to connect the operation handle (20) operated in the direction and the pinion gear (18), and the pinion gear (18) being rotatable And a supporting base (23).
  • the rotation control device (21) is coupled to the operation handle (20) and is rotated around the rotation axis of the pinion gear (18) by the rotation operation of the operation handle (20), and the input member (N) And a pinion gear (18) connected to the pinion gear (18) to transmit the rotation of the input member (N) to the pinion gear (18) as a feed rotation, and a pinion gear (18) fed and rotated by the feed portion (A). And a lock portion (B) for stopping rotation with respect to the base (23).
  • the feed portion (A) rotates integrally with the input member (N) by meshing with the feed pole (52) provided on the input member (N) while the feed pole (52) is biased.
  • the internal gear (36) and the pinion gear (18) are integrally coupled with each other in the rotational direction and are engaged with an engaging portion (36b) provided on the internal gear (36) to be integrated with the internal gear (36).
  • a rotating member (31) that automatically rotates.
  • the locking part (B) is provided on the rotating member (31) and meshed with the base gear (34) formed on the base (23) in a biased state, thereby rotating the rotating member (31). It has a plurality of lock poles (32, 33) for stopping.
  • the feed pole (52) and the lock pole (32, 33) receive rotation in one direction from the input member (N)
  • the feed pole (52) and the lock pole (32, 33) mesh with each meshing object so that power can be transmitted, and the input member (N) from the other direction.
  • a pair of ratchet-type meshing structures functioning symmetrically with each other are released so that power transmission to each meshing object is impossible.
  • the internal gear (36) is rotated in the downward direction until the engaging portion (36b) is engaged with the rotating member (31), so that the plurality of lock poles (32, 33) rotate in the downward direction. It has a lock release part (36a) which cancels
  • the internal gear (36) and the base gear (34) have internal gears having the same number of teeth.
  • the pinion gear (18) can be efficiently fed and rotated without loss with respect to the feed rotation amount of the internal gear (36) accompanying the rotation operation of the operation handle (20). it can.
  • the protrusion 31e which protrudes from the rotation member 31 is inserted in the engagement hole 36b as an engaging part provided in the internal gear 36, and the rotation member 31 is the protrusion 31e, the engagement hole 36b, and Is engaged with the internal gear 36 to rotate.
  • a protrusion as an engaging portion protruding from the internal gear 36 is inserted into an engaging hole provided in the rotating member 31, and the rotating member 31 is engaged by the engagement between the protrusion and the engaging hole. It may be configured to rotate integrally with the internal gear 36.
  • the cancel structure C can be configured to stop the release of the lock pole on the side where the rotation is stopped.
  • the internal gear 36 and the base gear 34 may have an internal gear having a number of teeth that is an integral multiple of the other side.
  • the lifter device of the present invention for example, it is possible to suppress the sliding of the seating surface height when the seating surface height of the seat is lowered.
  • the present invention exhibiting this effect is useful, for example, for a seat such as an automobile.

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  • Aviation & Aerospace Engineering (AREA)
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Abstract

A lifter device (10) that, by an internal gear (36) being rotated in the seat lowering direction relative to a lock plate (31) and as a result of the movement of engagement holes (36a), releases a pawl (33) from being meshed with inner teeth (34) and enables rotation of the lock plate (31) in the seat lowering direction. In addition, the lifter device (1) has a canceling structure (C) that stops release of the meshing between the pawl (33) and the inner teeth (34) by the engagement holes (36a) and suppresses rotation of the lock plate (31), if a reverse input to advance rotation is received from a pinion gear (18).

Description

リフタ装置Lifter device
 本発明は、リフタ装置に関する。詳しくは、シートを昇降動作させるリンク機構の入力ギヤに噛合するピニオンギヤと、シートを昇降動作させる際に対応する回転方向に操作される操作ハンドルとピニオンギヤとに連結されてピニオンギヤの回転を制御する回転制御装置と、を有するリフタ装置に関する。 The present invention relates to a lifter device. More specifically, a pinion gear that meshes with an input gear of a link mechanism that moves the seat up and down, and a rotation that controls the rotation of the pinion gear by being connected to an operation handle and a pinion gear that are operated in a corresponding rotation direction when the seat is moved up and down. And a control device.
 従来、車両用シートにおいて、シートクッションの座面高さを調節可能なリフタ装置を備えた構成が知られている(特許文献1)。具体的には、リフタ装置は、操作ハンドルを上げたり下げたりする操作によって、その操作移動量をギヤの送り回転移動量として伝達して、座面高さを一定量ずつ上げたり下げたりするようになっている。そして、リフタ装置は、操作ハンドルの操作が解かれることにより、上述したギヤの回転をその位置でロックすると共に、操作ハンドルを操作前のニュートラル位置へと付勢により戻して再操作が可能な初期状態へと戻されるようになっている。 Conventionally, a configuration in which a lifter device capable of adjusting a seat cushion height of a seat cushion is known in a vehicle seat (Patent Document 1). Specifically, the lifter device transmits the operation movement amount as the feed rotation movement amount of the gear by raising or lowering the operation handle so that the seat surface height is raised or lowered by a certain amount. It has become. Then, the lifter device unlocks the operation of the operation handle so that the rotation of the gear is locked at that position, and the operation handle is returned to the neutral position before the operation, and can be operated again. It will be returned to the state.
 上述した操作ハンドルの操作に伴うギヤの送り回転は、同ギヤに噛合された送りポールが操作ハンドルの操作方向に押し動かされることにより行われるようになっている。また、操作ハンドルの操作が解かれた際のギヤの回転ロックは、同ギヤに噛合された一対の対称構造から成るロックポールが、操作ハンドルの操作に伴って一方が外されると共に他方が送り方向には回転を逃がすが逆方向には食い込むラチェット式の噛合構造とされていることにより、操作ハンドルの操作が解かれた位置でギヤの送り回転及び戻り回転を止める形で行われるようになっている。 The above-mentioned feed rotation of the gear accompanying the operation of the operation handle is performed by pushing the feed pole meshed with the gear in the operation direction of the operation handle. In addition, when the operation handle is released, the gear rotation is locked by a pair of symmetrical lock pawls meshed with the gear. A ratchet type meshing structure that escapes rotation in the direction but bites in the reverse direction, so that the feed rotation and return rotation of the gear are stopped at the position where the operation handle is released. ing.
 上述したギヤの送り回転を行う送りポールは、操作ハンドルの操作が解かれた際のニュートラル位置へと戻される動きを許容できるように、上述したロックポールと同様に、一対の対称構造から成り、操作ハンドルの操作に伴って一方がギヤから外されると共に他方がギヤに対して送り方向には動力伝達可能に噛合するが逆方向には回転を逃がすラチェット式の噛合構造とされている。 The feed pole that performs the feed rotation of the gear described above is composed of a pair of symmetrical structures, like the lock pole described above, so as to allow the movement returned to the neutral position when the operation handle is released. In accordance with operation of the operation handle, one is disengaged from the gear, and the other is engaged with the gear so as to be able to transmit power in the feed direction, but has a ratchet type meshing structure that escapes rotation in the reverse direction.
日本国特開平10-67266号公報Japanese Unexamined Patent Publication No. 10-67266
 上記従来技術では、操作ハンドルの引き上げ操作によって座面高さが上げられた時には、操作ハンドルの操作解除によってギヤがその位置で回転止めされてシートクッションの下降移動が適切に阻止される。しかし、操作ハンドルの押し下げ操作によって座面高さが下げられた時には、操作ハンドルの操作が解除されても、ギヤがシートクッションの重力作用により送り回転を進行させる方向に負荷を受けやすく、同方向にはロックポールのラチェットによる回転止めが利かないことから、座面高さの移動が意図せず進行する状態(以下「滑り」という。)が生じやすくなる。本発明の目的の一つは、リフタ装置による座面高さを下げた際の座面高さの滑りを生じさせにくくすることである。 In the above-described prior art, when the seat height is raised by raising the operation handle, the gear is prevented from rotating at that position by releasing the operation handle, and the downward movement of the seat cushion is appropriately prevented. However, when the seat surface height is lowered by pushing down the operation handle, even if the operation handle is released, the gear is easily subjected to a load in the direction in which the rotation of the seat advances due to the gravity action of the seat cushion. In this case, the rotation of the seating surface is unintentionally advanced (hereinafter referred to as “sliding”) because the rotation of the lock pole cannot be prevented by the ratchet. One of the objects of the present invention is to make it difficult for the seat surface height to slip when the seat surface height is lowered by the lifter device.
[1]本発明の第1の側面において、リフタ装置は、
 シートを昇降動作させるリンク機構の入力ギヤに噛合するピニオンギヤと、
 シートを昇降動作させる際に対応する回転方向に操作される操作ハンドルと前記ピニオンギヤとの間を繋ぐように配置されて前記ピニオンギヤの回転を制御する回転制御装置と、
 前記ピニオンギヤを回転可能に支持するベースと、を備えるリフタ装置であって、
 前記回転制御装置が、
 前記操作ハンドルに結合されて前記操作ハンドルの回転操作により前記ピニオンギヤの回転軸線まわりに回される入力部材と、
 前記入力部材と前記ピニオンギヤとに連結されて前記入力部材の回転を前記ピニオンギヤに送り回転として伝達する送り部と、
 前記送り部により送り回転された前記ピニオンギヤの回転を前記ベースに対して止めるロック部と、を有し、
 前記送り部が、
 前記入力部材に設けられる送りポールと、前記送りポールが付勢された状態で噛合されることで前記入力部材と一体的に回転するインターナルギヤと、前記ピニオンギヤと回転方向において一体的に連結され且つ前記インターナルギヤに設けられる係合部との係合により前記インターナルギヤと一体的に回転する回転部材と、を有し、
 前記ロック部が、
 前記回転部材に設けられて前記ベースに形成されたベースギヤに対して付勢された状態で噛合されることで前記回転部材の回転を止める複数のロックポールを有し、
 前記送りポール及び前記ロックポールが、
 前記入力部材から一方向の回転が入力されたときにはそれぞれの噛合対象に動力伝達可能に噛合し、前記入力部材から他方向の回転が入力されたときにはそれぞれの前記噛合対象に動力伝達不能であるように噛合が解除される、一対の互いに対称向きに機能するラチェット式の噛合構造を有し、
 前記インターナルギヤが、
 前記回転部材に前記係合部が係合するまで前記一方向及び前記他方向のどちらかの操作方向に回されることで、前記複数の前記ロックポールのうちの前記操作方向への前記回転部材の回転を止めるための一部の前記ロックポールと、前記ベースギヤと、の噛合を解除するロック解除部と、
 当該インターナルギヤを介した前記回転部材の送り回転が止められた場合において前記ピニオンギヤから送り回転を更に進行させる方向の逆入力があったとき、前記逆入力による前記回転部材の回転の進行により、前記ロック解除部による前記一部の前記ロックポールと前記ベースギヤとの噛合の解除を中止するキャンセル構造と、を有する。
[1] In the first aspect of the present invention, the lifter device comprises:
A pinion gear meshing with an input gear of a link mechanism that moves the seat up and down;
A rotation control device that is arranged so as to connect between an operation handle that is operated in a corresponding rotation direction when the seat is moved up and down and the pinion gear, and that controls the rotation of the pinion gear;
A lifter device comprising a base that rotatably supports the pinion gear,
The rotation control device is
An input member coupled to the operation handle and rotated about a rotation axis of the pinion gear by a rotation operation of the operation handle;
A feed unit coupled to the input member and the pinion gear to transmit the rotation of the input member to the pinion gear as a feed rotation;
A lock portion that stops rotation of the pinion gear that is fed and rotated by the feed portion with respect to the base;
The feeding part is
A feed pole provided on the input member, an internal gear that rotates integrally with the input member by meshing in a state where the feed pole is biased, and a pinion gear that are integrally connected in the rotational direction. And a rotating member that rotates integrally with the internal gear by engagement with an engaging portion provided on the internal gear,
The lock part is
A plurality of lock poles that stop the rotation of the rotating member by being meshed in a state of being biased with respect to a base gear that is provided on the rotating member and formed on the base;
The feed pole and the lock pole are
When a rotation in one direction is input from the input member, it engages with each meshing object so that power can be transmitted. When a rotation in the other direction is input from the input member, power cannot be transmitted to each meshing object. Having a ratchet type meshing structure that functions in a pair of symmetrical directions, the meshing being released to each other,
The internal gear is
The rotating member in the operating direction among the plurality of lock poles is rotated in one of the one direction and the other direction until the engaging portion is engaged with the rotating member. A part of the lock pole for stopping the rotation of the base and the lock release part for releasing the meshing with the base gear,
When the feed rotation of the rotating member via the internal gear is stopped, when there is a reverse input in the direction of further advancement of the feed rotation from the pinion gear, due to the progress of the rotation of the rotating member by the reverse input, And a cancel structure for stopping the release of the engagement between the part of the lock poles and the base gear by the lock release portion.
 この第1の側面によれば、操作ハンドルの回転操作により送り部を介してピニオンギヤをシートの下降方向に回転させた際、ピニオンギヤからシートの重力作用に伴う送り回転を更に進行させる方向の逆入力があった場合、その逆入力によって回転部材の回転が更に進行することにより、ロックポールとベースギヤとの噛合の解除(即ち、ロック解除部の働きにより、回転部材が回転可能となっている状態)がキャンセルされ、ロックポールがベースギヤに噛合される。その結果、回転部材の更なる回転(即ち、逆入力に起因する滑り)が抑制される。このように、上記構成により、ピニオンギヤと一体を成す回転部材に設けられたロックポールのベースギヤに対する送り回転方向の滑り(ひいては、座面高さの滑り)を、適切に規制できる。 According to this first aspect, when the pinion gear is rotated in the downward direction of the seat through the feed portion by the rotation operation of the operation handle, the reverse input in the direction in which the feed rotation accompanying the gravity action of the seat further proceeds from the pinion gear. If there is, the rotation of the rotating member further proceeds due to the reverse input, so that the engagement between the lock pole and the base gear is released (that is, the rotating member can be rotated by the function of the lock releasing portion). Is canceled and the lock pole is engaged with the base gear. As a result, further rotation of the rotating member (that is, slippage due to reverse input) is suppressed. Thus, according to the above-described configuration, the slip in the feed rotation direction with respect to the base gear of the lock pole provided on the rotating member integrated with the pinion gear (and consequently the sliding of the seat surface height) can be appropriately regulated.
[2]本発明の第2の側面では、上述した第1の側面において、
 前記インターナルギヤと前記ベースギヤとが、互いに同数の歯数又は相手側の整数倍の歯数を持つ内歯車を有する。
[2] In the second aspect of the present invention, in the first aspect described above,
The internal gear and the base gear have internal gears having the same number of teeth or an integral multiple of the other side.
 この第2の側面によれば、操作ハンドルの回転操作に伴うインターナルギヤの送り回転に対して、ピニオンギヤをロスなく効率的に送り回転させることができる。 According to the second aspect, the pinion gear can be efficiently fed and rotated without loss with respect to the feed rotation of the internal gear accompanying the rotation operation of the operation handle.
図1は、実施例1のリフタ装置の概略構成を表した外側面図である。FIG. 1 is an outer side view illustrating a schematic configuration of the lifter device according to the first embodiment. 図2は、同外側面側の構造をシート内側から見た側面図である。FIG. 2 is a side view of the structure on the outer side as seen from the inside of the seat. 図3は、操作ハンドル及び回転制御装置をシートフレームから外した状態を示す分解斜視図である。FIG. 3 is an exploded perspective view showing a state in which the operation handle and the rotation control device are removed from the seat frame. 図4は、回転制御装置をシート外側から見た斜視図である。FIG. 4 is a perspective view of the rotation control device viewed from the outside of the seat. 図5は、回転制御装置をシート内側から見た斜視図である。FIG. 5 is a perspective view of the rotation control device viewed from the inside of the seat. 図6は、回転制御装置をシート外側から見た正面図である。FIG. 6 is a front view of the rotation control device viewed from the outside of the seat. 図7は、図6のVII-VII線断面図である。7 is a cross-sectional view taken along line VII-VII in FIG. 図8は、図6のVIII-VIII線断面図である。8 is a cross-sectional view taken along line VIII-VIII in FIG. 図9は、回転制御装置をシート外側から見た分解斜視図である。FIG. 9 is an exploded perspective view of the rotation control device viewed from the outside of the seat. 図10は、図9に示す一部の構成部品間の組み付け状態を示す分解斜視図である。10 is an exploded perspective view showing an assembled state between some of the components shown in FIG. 図11は、図10に示す一部の構成部品間の更なる組み付け状態を示す分解斜視図である。FIG. 11 is an exploded perspective view showing a further assembled state between some of the components shown in FIG. 図12は、図11に示す一部の構成部品間の更なる組み付け状態を示す分解斜視図である。12 is an exploded perspective view showing a further assembled state between some of the components shown in FIG. 図13は、回転制御装置をシート内側から見た分解斜視図である。FIG. 13 is an exploded perspective view of the rotation control device viewed from the inside of the seat. 図14は、図13に示す一部の構成部品間の組み付け状態を示す分解斜視図である。14 is an exploded perspective view showing an assembled state between some of the components shown in FIG. 図15は、図14に示す一部の構成部品間の更なる組み付け状態を示す分解斜視図である。FIG. 15 is an exploded perspective view showing a further assembled state between some of the components shown in FIG. 図16は、操作ハンドルが中立位置にある時の回転制御装置の送り部の状態図である。FIG. 16 is a state diagram of the feeding unit of the rotation control device when the operation handle is in the neutral position. 図17は、同ロック部の状態図である。FIG. 17 is a state diagram of the lock portion. 図18は、操作ハンドルが中立位置から途中位置まで押し下げられた時の送り部の状態図である。FIG. 18 is a state diagram of the feeding portion when the operation handle is pushed down from the neutral position to the middle position. 図19は、同ロック部の状態図である。FIG. 19 is a state diagram of the lock portion. 図20は、操作ハンドルが中立位置からフルストローク位置まで押し下げられた時の送り部の状態図である。FIG. 20 is a state diagram of the feeding portion when the operation handle is pushed down from the neutral position to the full stroke position. 図21は、同ロック部の状態図である。FIG. 21 is a state diagram of the lock portion. 図22は、操作ハンドルの押し下げ操作状態からピニオンギヤがシート側から受ける重力作用により進行回転した時の送り部の状態図である。FIG. 22 is a state diagram of the feeding unit when the pinion gear is rotated forward by the gravitational action received from the seat side from the state in which the operation handle is pushed down. 図23は、同ロック部の状態図である。FIG. 23 is a state diagram of the lock portion. 図24は、操作ハンドルが押し下げ操作状態から中立位置へと戻された時の送り部の状態図である。FIG. 24 is a state diagram of the feeding portion when the operation handle is returned from the push-down operation state to the neutral position. 図25は、同ロック部の状態図である。FIG. 25 is a state diagram of the lock portion. 図26は、操作ハンドルが中立位置から途中位置まで引き上げられた時の送り部の状態図である。FIG. 26 is a state diagram of the feeding unit when the operation handle is pulled up from the neutral position to the middle position. 図27は、同ロック部の状態図である。FIG. 27 is a state diagram of the lock portion. 図28は、ピニオンギヤの押し下げ操作方向の回転がストッパにより係止された状態図である。FIG. 28 is a state diagram in which the rotation of the pinion gear in the push-down operation direction is locked by the stopper. 図29は、ピニオンギヤの引き上げ操作方向の回転がストッパにより係止された状態図である。FIG. 29 is a state diagram in which the rotation of the pinion gear in the pulling operation direction is locked by the stopper.
 以下に、本発明を実施するための形態について、図面を用いて説明する。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
 <リフタ装置10の概略構成について>
 図1~3は、本発明の一実施形態であるリフタ装置10を適用した自動車用シート1(以下、単に「シート」という)を示す。各図中、矢印によりシート1を自動車に搭載した状態における各部の方向を示す。以下の説明において、方向に関する記述は、この方向を基準として行うものとする。
<About the schematic configuration of the lifter device 10>
1 to 3 show an automotive seat 1 (hereinafter simply referred to as “seat”) to which a lifter device 10 according to an embodiment of the present invention is applied. In each figure, the direction of each part in the state which mounted | wore the motor vehicle 1 with the arrow is shown. In the following description, the description regarding the direction is made based on this direction.
 図1のように、シート1は、座部を成すシートクッション2の後部に背凭れを成すシートバック3が設けられ、シートバック3は、シートクッション2に対して前後方向に回転自在とされている。シートクッション2は、下部にリフタ装置10及びシートスライド装置8を備え、ブラケット7を介して車両のフロア4に固定されている。 As shown in FIG. 1, the seat 1 is provided with a seat back 3 that forms a backrest at the rear portion of the seat cushion 2 that forms a seat, and the seat back 3 is rotatable in the front-rear direction with respect to the seat cushion 2. Yes. The seat cushion 2 includes a lifter device 10 and a seat slide device 8 at a lower portion, and is fixed to a vehicle floor 4 via a bracket 7.
 図2のように、シートスライド装置8は、公知のものであり、前後方向に延びる左右一対のロアレール5に対して左右一対のアッパレール6が前後スライド自在に結合されている。左右のロアレール5は、フロア4に固定された前後一対のブラケット7にそれぞれ固定支持されている。左右のアッパレール6の上には、リフタ装置10が設けられている。 As shown in FIG. 2, the seat slide device 8 is a well-known one, and a pair of left and right upper rails 6 are coupled to a pair of left and right lower rails 5 extending in the front and rear direction so as to be slidable in the front and rear directions. The left and right lower rails 5 are fixedly supported by a pair of front and rear brackets 7 fixed to the floor 4. A lifter device 10 is provided on the left and right upper rails 6.
 図2、3のように、リフタ装置10は、各アッパレール6上に固定されたベース部材14と、各アッパレール6の前後端部に回転自在に結合された複数のリンク部材11とを備え、シートクッション2の骨格部材であるサイドフレーム13、ベース部材14、及び各リンク部材11により4節リンクであるリンク機構12が構成されている。複数のリンク部材11のうち、右後側の後方リンク11bは、セクタギヤ16(本発明の「入力ギヤ」に相当)を備えて構成されており、回転制御装置21のピニオンギヤ18により前後方向に回転されるように構成されている。右後側の後方リンク11bのサイドフレーム13に対する回転軸は、トルクロッド17により構成されており、このトルクロッド17を介して左後側の後方リンク(図示略)も後方リンク11bと同期して回転するように構成されている。 As shown in FIGS. 2 and 3, the lifter device 10 includes a base member 14 fixed on each upper rail 6, and a plurality of link members 11 rotatably coupled to the front and rear end portions of each upper rail 6. A side frame 13 that is a skeleton member of the cushion 2, a base member 14, and each link member 11 constitute a link mechanism 12 that is a four-bar link. Of the plurality of link members 11, the rear link 11 b on the right rear side includes a sector gear 16 (corresponding to the “input gear” of the present invention) and is rotated in the front-rear direction by the pinion gear 18 of the rotation control device 21. It is configured to be. The rotation axis of the right rear rear link 11b with respect to the side frame 13 is constituted by a torque rod 17, and the left rear rear link (not shown) is also synchronized with the rear link 11b via the torque rod 17. It is configured to rotate.
 サイドフレーム13には、ピニオンギヤ18を挿入するための貫通孔13aが穿設されており、この貫通孔13aにピニオンギヤ18が挿入されるように回転制御装置21がサイドフレーム13の右側壁に固定されている。回転制御装置21は、シートクッション2の右側部に前後方向に延びて設けられた操作ハンドル20により正逆方向に回転操作可能とされている。操作ハンドル20を中立位置から上方に回転操作すると、回転制御装置21は、後方リンク11bをベース部材14から立ち上げる方向に回転し、操作ハンドル20を中立位置から下方に回転操作すると、回転制御装置21は、後方リンク11bをベース部材14上で伏せる方向に回転する。上述の4節リンクの構成により、後方リンク11bの回転に応じて前方リンク11aも回転し、シートクッション2のフロア4に対する高さ位置が操作ハンドル20の操作に応じて調整される。 The side frame 13 is provided with a through hole 13a for inserting the pinion gear 18, and the rotation control device 21 is fixed to the right side wall of the side frame 13 so that the pinion gear 18 is inserted into the through hole 13a. ing. The rotation control device 21 can be rotated in the forward and reverse directions by an operation handle 20 that extends in the front-rear direction on the right side portion of the seat cushion 2. When the operation handle 20 is rotated upward from the neutral position, the rotation control device 21 rotates in the direction in which the rear link 11b is raised from the base member 14, and when the operation handle 20 is rotated downward from the neutral position, the rotation control device. 21 rotates in a direction in which the rear link 11b is lowered on the base member 14. Due to the configuration of the four-bar link described above, the front link 11a also rotates according to the rotation of the rear link 11b, and the height position of the seat cushion 2 with respect to the floor 4 is adjusted according to the operation of the operation handle 20.
 <回転制御装置21の構成>
 図4~6は、回転制御装置21をシートクッション2から取り外した状態で示す。以下、回転制御装置21の構成を、図4~15に基づいて説明する。以下に説明する回転制御装置21の各構成部材の符号については、図4~15のいずれかを適宜参照するものとする。
<Configuration of rotation control device 21>
4 to 6 show the rotation control device 21 removed from the seat cushion 2. FIG. Hereinafter, the configuration of the rotation control device 21 will be described with reference to FIGS. 4 to 15 will be referred to as appropriate for the reference numerals of the components of the rotation control device 21 described below.
 回転制御装置21は、ベース部材である支持部材23(本発明の「ベース」に相当)の中心孔23cに回転軸22を貫通させて、支持部材23の左側面からピニオンギヤ18が突出するように組み付けられている。そして、支持部材23は、ピニオンギヤ18がサイドフレーム13の貫通孔13aに貫通する状態でサイドフレーム13に固定される。 The rotation control device 21 allows the rotation shaft 22 to pass through a center hole 23c of a support member 23 (corresponding to the “base” of the present invention) as a base member so that the pinion gear 18 protrudes from the left side surface of the support member 23. It is assembled. The support member 23 is fixed to the side frame 13 with the pinion gear 18 passing through the through hole 13 a of the side frame 13.
 支持部材23の右側面は、円板状のロックプレート31(本発明の「回転部材」に相当)を収容するように、左側に打出成形されて案内凹部23bが形成され、全体として円形容器形状とされている。案内凹部23bの内周面には後述するポール32、33(本発明の「ロックポール」に相当)が噛み合う内歯34(本発明の「ベースギヤ」に相当)が形成されている。ロックプレート31の中心にはスプライン孔31bが形成されており、回転軸22のスプライン22bと噛み合うようにされている。そのため、ロックプレート31は回転軸22と同期回転される。 The right side surface of the support member 23 is stamped and formed on the left side so as to accommodate a disk-shaped lock plate 31 (corresponding to the “rotating member” of the present invention) to form a guide recess 23b. It is said that. Inner teeth 34 (corresponding to "base gear" of the present invention) are formed on the inner peripheral surface of the guide recess 23b to engage with poles 32 and 33 (corresponding to "lock pole" of the present invention) which will be described later. A spline hole 31 b is formed at the center of the lock plate 31 so as to mesh with the spline 22 b of the rotary shaft 22. Therefore, the lock plate 31 is rotated synchronously with the rotary shaft 22.
 ロックプレート31の右側面の外周部には、上下に分散して各1個の突起31dが突出形成され、前後に分散して各2個の突起31eが突出形成されている。各突起31eには、各ポール32、33の貫通孔32a、33aが嵌合されて、各ポール32、33が各突起31eを中心として揺動自在とされている。また、各突起31dには、それぞれトーションスプリング35の巻回部35aが嵌合され、トーションスプリング35の各端部35bは各ポール32、33に係合されており、各ポール32、33をロックプレート31の外周側へ付勢している。そのため、各ポール32、33の外歯を成す係合端部32c、33cは、支持部材23の内歯34に常時噛み合うようにされている。 The outer peripheral portion of the right side surface of the lock plate 31 is formed with one protrusion 31d protruding in the vertical direction and two protrusions 31e protruding in the front-back direction. The projections 31e are fitted with through holes 32a and 33a of the poles 32 and 33 so that the poles 32 and 33 can swing around the projections 31e. Further, each projection 31d is fitted with a winding portion 35a of a torsion spring 35, and each end portion 35b of the torsion spring 35 is engaged with each of the poles 32 and 33, and locks each of the poles 32 and 33. The plate 31 is biased toward the outer peripheral side. Therefore, the engaging end portions 32 c and 33 c forming the external teeth of the poles 32 and 33 are always engaged with the internal teeth 34 of the support member 23.
 以上のように支持部材23に対して各ポール32、33の連結されたロックプレート31が組み付けられた状態が図11に示されている。 FIG. 11 shows a state in which the lock plate 31 connected to the poles 32 and 33 is assembled to the support member 23 as described above.
 <回転制御装置21の構成>
 全体として右側に膨らんだ容器状に形成されたカバー24の右側面上には、操作ハンドル20に結合されて回転操作される入力部材Nのアウタピースを構成する板状のアウタプレート41が設けられている。カバー24の中心の貫通孔24eとアウタプレート41の中心孔41bには、略円筒状を成す軸部材25の中心から右側に丸棒状に突出する突出ピン25bが左側から貫通して挿入されている。また、カバー24に形成された一対の円弧状を成す開口部24aとアウタプレート41に形成された一対の円弧状を成す貫通孔41aには、上述した入力部材Nのインナピースを構成する板状のインナプレート53に形成された一対のアーム53aが左側から挿入されている。上記一対のアーム53aは、インナプレート53とアウタプレート41との間に軸部材25のフランジ部25cとカバー24とを左右方向に挟み込む位置までアウタプレート41の対応する貫通孔41a内に挿入され、その位置(挟持位置)で、対応する貫通孔41aに挿入された先の突出部分がアウタプレート41の対応する貫通孔41aの外周側の周囲部分と溶接されて結合されている(溶接部W:図8参照)。
<Configuration of rotation control device 21>
A plate-like outer plate 41 constituting an outer piece of the input member N that is coupled to the operation handle 20 and is rotated is provided on the right side surface of the cover 24 formed in a container shape that swells to the right as a whole. Yes. A projecting pin 25b that protrudes in a round bar shape from the center of the substantially cylindrical shaft member 25 to the right is inserted into the through hole 24e at the center of the cover 24 and the center hole 41b of the outer plate 41 from the left side. . In addition, a pair of arcuate openings 24a formed in the cover 24 and a pair of arcuate through holes 41a formed in the outer plate 41 are plate-like members that constitute the inner piece of the input member N described above. A pair of arms 53a formed on the inner plate 53 is inserted from the left side. The pair of arms 53a are inserted into the corresponding through holes 41a of the outer plate 41 to a position where the flange portion 25c of the shaft member 25 and the cover 24 are sandwiched in the left-right direction between the inner plate 53 and the outer plate 41, At that position (clamping position), the previous protruding portion inserted into the corresponding through hole 41a is welded and joined to the peripheral portion on the outer peripheral side of the corresponding through hole 41a of the outer plate 41 (welded portion W: (See FIG. 8).
 上記結合により、カバー24とアウタプレート41とが互いに軸部材25を介して摺動自在に結合されている。アウタプレート41の上部には、係合片42が左側に屈曲して形成されており、係合片42は、カバー24の右側に突出して形成された係合片24bの内周側に並んで配置されている。これらの係合片42、24bの周りを包むようにトーションスプリング43の端部43aが配置されている。そのため、アウタプレート41が操作ハンドル20により回転操作されると、係合片42が係合片24bから周方向に離間するように移動するが、係る回転操作が解除されると、トーションスプリング43の付勢力により、係合片42と係合片24bとが周方向で互いに重なる位置となり、アウタプレート41が回転操作前の位置に戻される。 The cover 24 and the outer plate 41 are slidably coupled to each other via the shaft member 25 by the above coupling. On the upper part of the outer plate 41, an engagement piece 42 is formed to bend to the left side, and the engagement piece 42 is aligned with the inner peripheral side of the engagement piece 24b formed to protrude to the right side of the cover 24. Has been placed. An end 43a of the torsion spring 43 is disposed so as to wrap around the engaging pieces 42 and 24b. Therefore, when the outer plate 41 is rotated by the operation handle 20, the engagement piece 42 moves so as to be separated from the engagement piece 24 b in the circumferential direction, but when the rotation operation is released, the torsion spring 43 of the torsion spring 43 is moved. Due to the urging force, the engagement piece 42 and the engagement piece 24b are in a position where they overlap each other in the circumferential direction, and the outer plate 41 is returned to the position before the rotation operation.
 また、カバー24の左側には、容器状のカバー24内に収容されるようにインナプレート53及びカム部材54が設けられている。そして、カバー24は、これらの部品をロックプレート31及び回転伝達プレート36(本発明の「インターナルギヤ」に相当)と共に挟んで支持部材23に固定されている。このとき、カバー24の脚部24dを支持部材23の貫通孔23aにリベット(図示略)により固定している。 Further, an inner plate 53 and a cam member 54 are provided on the left side of the cover 24 so as to be accommodated in the container-like cover 24. The cover 24 is fixed to the support member 23 by sandwiching these components together with the lock plate 31 and the rotation transmission plate 36 (corresponding to the “internal gear” of the present invention). At this time, the leg portion 24d of the cover 24 is fixed to the through hole 23a of the support member 23 with a rivet (not shown).
 カム部材54は、概ねリング状に形成されており、右側面上に4つのピン54bを備え、リング状の内周の上側にカム突起54aが突出して形成されている。カム部材54は、各ピン54bがカバー24の突片24cの貫通孔に嵌合されてカバー24の内側に固定されている。 The cam member 54 is generally formed in a ring shape, is provided with four pins 54b on the right side surface, and is formed with a cam projection 54a protruding above the inner periphery of the ring shape. Each pin 54 b of the cam member 54 is fixed to the inside of the cover 24 by fitting into the through hole of the protruding piece 24 c of the cover 24.
 インナプレート53は、前後部に右側に延びるアーム53aをそれぞれ備え、各アーム53aは、上述したようにカバー24の対応する各開口部24aを通ってアウタプレート41の対応する各貫通孔41aに貫通している。カバー24の各開口部24aは、各アーム53aよりも長い周方向の長さを有し、アウタプレート41の対応する各貫通孔41aは、各アーム53aと略同一の周方向の長さを有している。そのため、インナプレート53は、アウタプレート41と一体的となって回転操作され、各アーム53aがカバー24の各開口部24aの周方向の端部に当たる位置にてそれぞれの周方向の回転操作が係止されるようになっている。インナプレート53の左側面上には、一対の送り爪52(本発明の「送りポール」に相当)が、各送り爪52のヒンジ部52bをインナプレート53の対応する各貫通孔53bに嵌合して揺動自在に結合されている。 The inner plate 53 includes arms 53a extending rightward on the front and rear portions, and each arm 53a passes through the corresponding opening 24a of the cover 24 and passes through the corresponding through hole 41a of the outer plate 41 as described above. is doing. Each opening 24a of the cover 24 has a longer circumferential length than each arm 53a, and each corresponding through hole 41a of the outer plate 41 has a circumferential length substantially the same as each arm 53a. is doing. Therefore, the inner plate 53 is rotated integrally with the outer plate 41, and each circumferential rotation operation is engaged at a position where each arm 53 a hits the circumferential end of each opening 24 a of the cover 24. It has come to be stopped. On the left side surface of the inner plate 53, a pair of feed claws 52 (corresponding to the “feed pole” of the present invention) fits the hinge portions 52 b of the feed claws 52 into the corresponding through holes 53 b of the inner plate 53. Thus, they are coupled so as to freely swing.
 <回転制御装置21の構成(回転伝達プレート36)>
 インナプレート53の左側には、略円板形状の回転伝達プレート36が設けられており、回転伝達プレート36は、インナプレート53とロックプレート31との間に挟まれている。回転伝達プレート36の円板面部には各ポール32、33に対応して4個の略四角形の係合孔36a(本発明の「ロック解除部」に相当)が形成されており、これら係合孔36a内に各ポール32、33のピン32b、33bが周方向に係合可能に挿入されている。また、回転伝達プレート36の円板面部には各突起31dに対応して2個の楕円形の係合孔36b(本発明の「係合部」に相当)が形成されており、これら係合孔36b内に各突起31dが周方向に係合可能に挿入されている。
<Configuration of Rotation Control Device 21 (Rotation Transmission Plate 36)>
A substantially disc-shaped rotation transmission plate 36 is provided on the left side of the inner plate 53, and the rotation transmission plate 36 is sandwiched between the inner plate 53 and the lock plate 31. Four disk-shaped engagement holes 36a (corresponding to the “unlocking portion” of the present invention) are formed in the disk surface portion of the rotation transmission plate 36 corresponding to the poles 32 and 33. The pins 32b and 33b of the poles 32 and 33 are inserted into the holes 36a so as to be engageable in the circumferential direction. Further, two elliptical engagement holes 36b (corresponding to the “engagement portion” of the present invention) are formed in the disk surface portion of the rotation transmission plate 36 corresponding to each protrusion 31d. Each protrusion 31d is inserted into the hole 36b so as to be engageable in the circumferential direction.
 更に、回転伝達プレート36の右側面上には、中心孔36dの周りにトーションスプリング37、55が設けられている。トーションスプリング37は、その端部37aが左側に屈曲されて回転伝達プレート36の長孔36cとロックプレート31の長孔31cとに跨って挿入されてこれら長孔36c,31cに跨って周方向の双方向に付勢力を及ぼす状態に設けられている。トーションスプリング37は、その付勢力によりロックプレート31に対する回転伝達プレート36の回転角度を中立位置に維持するようにしている。一方、トーションスプリング55の端部55aは、送り爪52の突部52dに径方向の内側から付勢力を掛けて各送り爪52を外周側に押圧している。また、トーションスプリング55の中央部には、右側に向けて突出した突起55bが形成されている。突起55bは、インナプレート53の下端中央部に形成された係合孔53cに挿入して係合されている。そのため、送り爪52の突部52dは、トーションスプリング55の端部55aに常時押圧されて、係合端部52aは、回転伝達プレート36の内歯51に噛み合うようにされている。上述した回転伝達プレート36の内歯51と支持部材23の内歯34とは、互いに同一の歯数を持つ構成とされている。 Further, on the right side surface of the rotation transmission plate 36, torsion springs 37 and 55 are provided around the center hole 36d. The end portion 37a of the torsion spring 37 is bent to the left side and is inserted across the long hole 36c of the rotation transmission plate 36 and the long hole 31c of the lock plate 31 and extends in the circumferential direction across the long holes 36c and 31c. It is provided in a state that exerts an urging force in both directions. The torsion spring 37 maintains the rotation angle of the rotation transmission plate 36 with respect to the lock plate 31 in the neutral position by the biasing force. On the other hand, the end 55a of the torsion spring 55 applies a biasing force to the protrusion 52d of the feed claw 52 from the inside in the radial direction to press each feed claw 52 to the outer peripheral side. In addition, a projection 55 b that protrudes toward the right side is formed at the center of the torsion spring 55. The protrusion 55b is inserted into and engaged with an engagement hole 53c formed at the center of the lower end of the inner plate 53. Therefore, the protrusion 52 d of the feed claw 52 is constantly pressed by the end 55 a of the torsion spring 55, and the engagement end 52 a is engaged with the internal teeth 51 of the rotation transmission plate 36. The internal teeth 51 of the rotation transmission plate 36 and the internal teeth 34 of the support member 23 are configured to have the same number of teeth.
 以上のように、カバー24にアウタプレート41、インナプレート53、カム部材54、送り爪52、回転伝達プレート36の内歯51、及びトーションスプリング55が組み付けられた状態が図11、15に示されている。また、ロックプレート31上に回転伝達プレート36が組み付けられた状態が図12に示されている。なお、図11、12は、回転制御装置21の組み付け手順を示すものではないが、最終的に軸部材25のスプライン穴25aに回転軸22のスプライン22cを嵌合し、更にカバー24を支持部材23に固定することにより回転制御装置21としての組み付けが完了する。軸部材25のスプライン穴25aは、インナプレート53の中心孔53d(図8参照)内に右側から通されて露出する軸部材25の左側の端部に形成されている。 11 and 15 show the state in which the outer plate 41, the inner plate 53, the cam member 54, the feed claw 52, the internal teeth 51 of the rotation transmission plate 36, and the torsion spring 55 are assembled to the cover 24 as described above. ing. FIG. 12 shows a state where the rotation transmission plate 36 is assembled on the lock plate 31. 11 and 12 do not show the assembly procedure of the rotation control device 21, but the spline 22c of the rotary shaft 22 is finally fitted into the spline hole 25a of the shaft member 25, and the cover 24 is further supported by the support member. Assembling as the rotation control device 21 is completed. The spline hole 25a of the shaft member 25 is formed at the left end portion of the shaft member 25 that is exposed through the center hole 53d (see FIG. 8) of the inner plate 53 from the right side.
 ここで、図9に示すように、上述したアウタプレート41とピニオンギヤ18との間に連結されて、アウタプレート41の回転をピニオンギヤ18に送り回転として伝達する送り爪52、回転伝達プレート36及びロックプレート31から成る動力伝達系統が送り部Aとして構成される。また、送り部Aにより送り回転されたピニオンギヤ18の回転を支持部材23に対して止める各ポール32、33から成る機構部がロック部Bとして構成される。 Here, as shown in FIG. 9, the feed claw 52, the rotation transmission plate 36, and the lock which are connected between the outer plate 41 and the pinion gear 18 and transmit the rotation of the outer plate 41 to the pinion gear 18 as a feed rotation. A power transmission system composed of the plate 31 is configured as the feeding portion A. Further, a mechanism portion including the respective poles 32 and 33 for stopping the rotation of the pinion gear 18 fed and rotated by the feed portion A with respect to the support member 23 is configured as a lock portion B.
 <回転制御装置21の構成(ストッパ60)>
 回転軸22のピニオンギヤ18とスプライン22bとの間には、ギヤ形状のない同心円状の外周面22aが形成されており、外周面22aの特定の角度位置の外周側には回転軸側突部63が径方向に突出して形成されている。支持部材23の中心孔23cに回転軸22が挿入された状態で、回転軸側突部63は、支持部材23の案内凹部23bの右側面上に露出するように位置している。
<Configuration of rotation control device 21 (stopper 60)>
A concentric outer peripheral surface 22a having no gear shape is formed between the pinion gear 18 of the rotating shaft 22 and the spline 22b, and the rotating shaft side protrusion 63 is formed on the outer peripheral side of the specific angular position of the outer peripheral surface 22a. Is formed to project in the radial direction. In a state where the rotation shaft 22 is inserted into the center hole 23 c of the support member 23, the rotation shaft side protrusion 63 is positioned so as to be exposed on the right side surface of the guide recess 23 b of the support member 23.
 支持部材23の案内凹部23bの右側面上には、円弧状の支持部材側突部61が打出形成されている。一方、ロックプレート31のスプライン孔31bの周りには、スプライン孔31bに対して同心円を成す摺動面部31aを形成するように、ロックプレート31が打出形成されている。ロックプレート31が支持部材23に対して回転したとき、支持部材側突部61の外周が摺動面部31aの内周上を摺動するようにされている。また、摺動面部31aの内周と回転軸22の外周面22aとの間の隙間を摺動するように係合片62が配置されている。 On the right side surface of the guide recess 23 b of the support member 23, an arc-shaped support member side protrusion 61 is formed by stamping. On the other hand, around the spline hole 31b of the lock plate 31, the lock plate 31 is formed so as to form a sliding surface portion 31a concentric with the spline hole 31b. When the lock plate 31 is rotated with respect to the support member 23, the outer periphery of the support member side protrusion 61 slides on the inner periphery of the sliding surface portion 31a. Further, the engaging piece 62 is arranged so as to slide in the gap between the inner periphery of the sliding surface portion 31 a and the outer peripheral surface 22 a of the rotating shaft 22.
 そのため、回転制御装置21の作動により回転軸22が下降方向に回転され、下限位置に達すると、図28のように、回転軸側突部63が係合片62を挟んで支持部材側突部61の端部に当接し、回転軸22のそれ以上の回転が止められる。回転軸22が上昇方向に回転される状態で、図29のように、上限位置に達すると、回転軸側突部63が係合片62を挟んで支持部材側突部61の反対側の端部に当接し、回転軸22のそれ以上の回転が止められる。 Therefore, when the rotation shaft 22 is rotated in the downward direction by the operation of the rotation control device 21 and reaches the lower limit position, the rotation shaft side protrusion 63 sandwiches the engagement piece 62 and the support member side protrusion as shown in FIG. Abutting on the end of 61, the rotation of the rotary shaft 22 is stopped. When the rotary shaft 22 is rotated in the upward direction and reaches the upper limit position as shown in FIG. 29, the rotary shaft side protrusion 63 is located at the opposite end of the support member side protrusion 61 with the engagement piece 62 interposed therebetween. A further portion of the rotary shaft 22 is stopped.
 <回転制御装置21の作用(操作ハンドル20が非操作)>
 以下、図16~27に基づいて回転制御装置21によるシートクッション2の高さ調整作用について説明する。
<Operation of the rotation control device 21 (the operation handle 20 is not operated)>
Hereinafter, the height adjusting operation of the seat cushion 2 by the rotation control device 21 will be described with reference to FIGS.
 図16、17は、操作ハンドル20が操作されず、アウタプレート41及びインナプレート53が回転されていない、中立位置の状態を示す。このとき、図16のように、送り爪52は、トーションスプリング55の付勢によりその外歯を成す係合端部52aが回転伝達プレート36の内歯51に係合した状態とされている。また、図17のように、各ポール32、33は、各トーションスプリング35の付勢により各係合端部32c、33cが支持部材23の内歯34に係合した状態とされている。よって、上記各ポール32、33の係合を介してロックプレート31の回転がロックされて、シート1の高さは上昇側にも、下降側にも変更されない。 16 and 17 show a neutral position in which the operation handle 20 is not operated and the outer plate 41 and the inner plate 53 are not rotated. At this time, as shown in FIG. 16, the feed claw 52 is in a state where the engagement end portion 52 a forming its outer teeth is engaged with the inner teeth 51 of the rotation transmission plate 36 by the urging of the torsion spring 55. As shown in FIG. 17, the pawls 32 and 33 are in a state in which the engaging end portions 32 c and 33 c are engaged with the internal teeth 34 of the support member 23 by the urging of the torsion springs 35. Therefore, the rotation of the lock plate 31 is locked through the engagement of the poles 32 and 33, and the height of the seat 1 is not changed to the ascending side or the descending side.
 <回転制御装置21の作用(操作ハンドル20を押し下げ操作)>
 図18、19は、操作ハンドル20が中立位置から途中位置まで押し下げ操作された状態を示す。このとき、図18のように、アウタプレート41の回転によりインナプレート53が矢印方向に回転される。その結果、各送り爪52が同方向に移動される。そのため、前側の送り爪52の外歯を成す係合端部52aが回転伝達プレート36の内歯51に力を伝達して、回転伝達プレート36を矢印方向に押し回す。このとき、後側の送り爪52の外歯を成す係合端部52aは回転伝達プレート36の内歯51と噛み合わないようにされている。即ち、この状態では、係合端部52aの歯が内歯51の歯の法線方向の荷重を受けて噛合解除方向に移動される。しかも、回転伝達プレート36の回転に伴って、後側の送り爪52のピン52cがカム部材54のカム突起54aに乗り上げて、係合端部52aが内歯51から離された状態とされる。
<Operation of Rotation Control Device 21 (Operation for Depressing Operation Handle 20)>
18 and 19 show a state in which the operation handle 20 is pushed down from the neutral position to the middle position. At this time, as shown in FIG. 18, the inner plate 53 is rotated in the direction of the arrow by the rotation of the outer plate 41. As a result, each feed claw 52 is moved in the same direction. Therefore, the engagement end portion 52a forming the external teeth of the front feed claw 52 transmits a force to the internal teeth 51 of the rotation transmission plate 36, and pushes the rotation transmission plate 36 in the direction of the arrow. At this time, the engagement end portion 52 a forming the external tooth of the rear feed claw 52 is not engaged with the internal tooth 51 of the rotation transmission plate 36. In other words, in this state, the teeth of the engagement end 52a are moved in the meshing release direction under the load in the normal direction of the teeth of the inner teeth 51. In addition, as the rotation transmission plate 36 rotates, the pin 52c of the rear feeding claw 52 rides on the cam projection 54a of the cam member 54, and the engagement end 52a is separated from the internal teeth 51. .
 このようにして回転伝達プレート36が回転されると、図19のように、回転伝達プレート36の対応する各係合孔36aが各ポール33のピン33bに係合して各ポール33の係合端部33cを支持部材23の内歯34から外すように径方向の内側に押し回す。それにより、下降方向のロックプレート31のロック状態が解除される。その後、係合孔36bにロックプレート31の突起31dが係合すると、回転伝達プレート36の回転がロックプレート31に伝達できる状態となる。なお、図中の白抜きの2点鎖線矢印は、図示には表れない回転伝達プレート36の回転を表している。 When the rotation transmission plate 36 is rotated in this way, the corresponding engagement holes 36a of the rotation transmission plate 36 are engaged with the pins 33b of the respective poles 33 as shown in FIG. The end 33c is pushed inward in the radial direction so as to be removed from the internal teeth 34 of the support member 23. Thereby, the lock state of the lock plate 31 in the descending direction is released. Thereafter, when the protrusion 31 d of the lock plate 31 is engaged with the engagement hole 36 b, the rotation of the rotation transmission plate 36 can be transmitted to the lock plate 31. In addition, the open two-dot chain line arrow in a figure represents rotation of the rotation transmission plate 36 which does not appear in illustration.
 詳しくは、上述した回転伝達プレート36に形成された4個の係合孔36aは、それぞれ、径方向の内側から外側へ向けて周方向の孔幅を狭める略台形状の形に形成されている。上述した4個の係合孔36aは、図16~17に示すように回転伝達プレート36がロックプレート31に対してトーションスプリング37の付勢作用によって中立位置の状態にある時には、各ポール32、33のピン32b、33b(丸ピン)に対して次のように位置付けられるようになっている。すなわち、各ポール32のピン32bが挿入された2個の係合孔36aは、各ピン32bに対してそれらの周方向に面を向ける傾斜側面を図示時計回り方向に近付けた、周方向に偏った状態に位置付けられるようになっている。また、各ポール33のピン33bが挿入された2個の係合孔36aは、各ピン33bに対してそれらの周方向に面を向ける傾斜側面を図示反時計回り方向に近付けた、周方向に偏った状態に位置付けられるようになっている。 Specifically, the four engagement holes 36a formed in the rotation transmission plate 36 described above are each formed in a substantially trapezoidal shape that narrows the hole width in the circumferential direction from the inner side to the outer side in the radial direction. . As shown in FIGS. 16 to 17, the four engagement holes 36a described above are arranged so that each of the pawls 32, when the rotation transmission plate 36 is in the neutral position by the urging action of the torsion spring 37 with respect to the lock plate 31. 33 pins 32b and 33b (round pins) are positioned as follows. That is, the two engagement holes 36a into which the pins 32b of the poles 32 are inserted are biased in the circumferential direction with the inclined side surfaces facing the pins 32b in the circumferential direction approaching the clockwise direction in the figure. It is supposed to be positioned in the state. Further, the two engaging holes 36a into which the pins 33b of the poles 33 are inserted are arranged in the circumferential direction, with the inclined side surfaces facing the respective pins 33b facing in the circumferential direction approaching the counterclockwise direction shown in the figure. It can be positioned in a biased state.
 このような構成とされていることにより、回転伝達プレート36は、上述した中立位置から図18~19に示す形に回されることで、各ポール33のピン33bが挿入された2個の係合孔36aの傾斜側面をこれら2つのピン33bに当接させて、その回転の進行に伴って各ピン33bを各係合孔36aの傾斜側面に沿って径方向の内側に押し滑らせながら、他の2つのポール32の係合端部32cを支持部材23の内歯34に噛合させた状態に残しつつ、各ポール33の係合端部33cを支持部材23の内歯34から外す形に回転させるようになっている。 With this configuration, the rotation transmission plate 36 is rotated from the above-described neutral position to the shape shown in FIGS. 18 to 19, so that the two engagement pins into which the pins 33b of the respective poles 33 are inserted. The inclined side surface of the joint hole 36a is brought into contact with these two pins 33b, and the pins 33b are pushed and slid radially inward along the inclined side surface of each engaging hole 36a as the rotation proceeds, The engagement end portions 33c of the respective poles 33 are removed from the internal teeth 34 of the support member 23 while leaving the engagement end portions 32c of the other two poles 32 engaged with the internal teeth 34 of the support member 23. It is designed to rotate.
 同様に、回転伝達プレート36は、上述した中立位置から図26~27に示す形(反対回り)に回されることで、各ポール32のピン32bが挿入された2個の係合孔36aの傾斜側面をこれら2つのピン32bに当接させて、その回転の進行に伴って各ピン32bを各係合孔36aの傾斜側面に沿って径方向の内側に押し滑らせながら、他の2つのポール33の係合端部33cを支持部材23の内歯34に噛合させた状態に残しつつ、各ポール32の係合端部32cを支持部材23の内歯34から外す形に回転させるようになっている。 Similarly, the rotation transmission plate 36 is rotated from the above-described neutral position to the shape shown in FIGS. 26 to 27 (in the opposite direction), so that the two engagement holes 36a into which the pins 32b of the respective poles 32 are inserted. While the inclined side surface is brought into contact with these two pins 32b, the other two pins 32b are pushed and slid radially inward along the inclined side surface of each engagement hole 36a as the rotation proceeds. The engagement end portion 32c of each pole 32 is rotated so as to be disengaged from the inner teeth 34 of the support member 23 while leaving the engagement end portion 33c of the pole 33 engaged with the inner teeth 34 of the support member 23. It has become.
 上述した各ポール32、33は、それぞれ、図17に示すように、それらの係合端部32c、33cが支持部材23の内歯34に噛合されている時には、それらのピン32b、33bが、各ポール32、33のロックプレート31に対する回転中心である突起31eと内歯34の歯先との間の径方向(ラジアル方向)の中間部に位置するようになっている。そのようなことから、各ポール32、33を回転伝達プレート36の回転移動量に対して効率的に径方向の内側に回転させて、支持部材23の内歯34との噛合から外すことができる(図19、27参照)。したがって、操作ハンドル20の操作に伴う各ポール32、33のロックの解除操作に要するストロークを短くできる。 As shown in FIG. 17, each of the above-described poles 32 and 33 has their engagement ends 32 c and 33 c meshed with the inner teeth 34 of the support member 23. The poles 32 and 33 are positioned at the intermediate portion in the radial direction (radial direction) between the protrusion 31e that is the rotation center of the lock plate 31 with respect to the lock plate 31 and the tooth tip of the internal tooth 34. Therefore, each of the poles 32 and 33 can be efficiently rotated radially inward with respect to the rotational movement amount of the rotation transmission plate 36 to be disengaged from the internal teeth 34 of the support member 23. (See FIGS. 19 and 27). Therefore, the stroke required for the unlocking operation of the poles 32 and 33 accompanying the operation of the operation handle 20 can be shortened.
 また、図19、27に示すように、上述した各ポール32、33のピン32b、33bを回転方向に押し回す回転伝達プレート36の各係合孔36aは、それらの各ピン32b、33b(仮想線で示すロック状態時)との接触面となる傾斜側面と、各ポール32、33の外歯を成す係合端部32c、33cの回転中心(突起31e)から最も離れた歯面の内歯34の歯面との接触面と、の成す角αが、これらの歯面間で定められる摩擦角より大きくなるように、各傾斜側面の傾斜形状が設定されている。なお、上記成す角αの設定は、各ポール32、33の外歯を成す係合端部32c、33cのうちの、回転中心(突起31e)から最も離れた歯面以外の歯面についても適用され得る。更に、図17に示すように、各ポール32、33の外歯を成す係合端部32c、33cは、それらの歯面が接触する支持部材23の内歯34の歯面の接触面の法線と、接触点と各ポール32、33の回転中心(突起31e)を結ぶ線分の成す角βが、これらの歯面間で定められる摩擦角より小さくなるように、それらの歯面形状が設定されている。そのようなことから、回転伝達プレート36が各ポール32、33を回転方向に押圧する力によって、各ポール32、33の係合端部32c、33cを突起31eを中心に支持部材23の内歯34からスムーズに外すことができる(図19、27参照)。 Further, as shown in FIGS. 19 and 27, the engagement holes 36a of the rotation transmission plate 36 for pushing the pins 32b and 33b of the poles 32 and 33 in the rotation direction are respectively connected to the pins 32b and 33b (virtual And the inner teeth on the tooth surfaces farthest from the center of rotation (protrusion 31e) of the engaging ends 32c, 33c forming the outer teeth of the poles 32, 33. The inclined shape of each inclined side surface is set so that the angle α formed by the contact surface with the 34 tooth surfaces is larger than the friction angle defined between these tooth surfaces. The setting of the angle α is also applied to the tooth surfaces other than the tooth surfaces farthest from the rotation center (projection 31e) among the engaging end portions 32c and 33c forming the external teeth of the poles 32 and 33. Can be done. Further, as shown in FIG. 17, the engaging end portions 32c and 33c forming the external teeth of the respective poles 32 and 33 have a contact surface method of the tooth surfaces of the internal teeth 34 of the support member 23 with which the tooth surfaces contact. The tooth surface shape is such that the angle β formed between the line and the line connecting the contact point and the rotation center (projection 31e) of each pole 32, 33 is smaller than the friction angle defined between these tooth surfaces. Is set. For this reason, the engagement end portions 32c and 33c of the poles 32 and 33 are centered around the protrusion 31e by the force with which the rotation transmission plate 36 presses the poles 32 and 33 in the rotational direction. 34 can be removed smoothly (see FIGS. 19 and 27).
 <回転制御装置21の作用(操作ハンドル20をフルストローク操作)>
 図20、21は、操作ハンドル20が中立位置からフルストローク位置まで押し下げ操作された状態を示す。なお、フルストローク位置は、インナプレート53のアーム53aがカバー24の開口部24aの周方向の端部に当接することにより決められる。このとき、図20のように、図18の状態に比べてインナプレート53及び各送り爪52の回転は進行して、前側の送り爪52により回転伝達プレート36の回転角度が大きくされる。
<Operation of rotation control device 21 (full stroke operation of operation handle 20)>
20 and 21 show a state where the operation handle 20 is pushed down from the neutral position to the full stroke position. The full stroke position is determined by the arm 53a of the inner plate 53 coming into contact with the circumferential end of the opening 24a of the cover 24. At this time, as shown in FIG. 20, the rotation of the inner plate 53 and each feed claw 52 proceeds as compared with the state of FIG. 18, and the rotation angle of the rotation transmission plate 36 is increased by the front feed claw 52.
 このようにして回転伝達プレート36の回転角度が大きくなると、図21のように、回転伝達プレート36の回転がロックプレート31に伝達されてロックプレート31は回転され、大きな黒塗矢印で示すように回転軸22を回転する。その結果、ピニオンギヤ18が回転され、シートクッション2は下降される。このとき、各ポール32の係合端部32cは支持部材23の内歯34と噛み合わないようにされている。即ち、この状態では、係合端部32cの歯が内歯34の歯の法線方向の荷重を受けて噛合解除方向に移動される。そのため、ロックプレート31が回転すると、各ポール32の係合端部32cは支持部材23の内歯34の上を滑るように摺動されることとなる。このときの各ポール32の動きを、実線と仮想線で示している。また、波型の矢印によっても示している。 When the rotation angle of the rotation transmission plate 36 is increased in this manner, the rotation of the rotation transmission plate 36 is transmitted to the lock plate 31 and the lock plate 31 is rotated, as shown in FIG. The rotating shaft 22 is rotated. As a result, the pinion gear 18 is rotated and the seat cushion 2 is lowered. At this time, the engagement end portion 32 c of each pole 32 is configured not to mesh with the internal teeth 34 of the support member 23. That is, in this state, the teeth of the engagement end portion 32c are moved in the meshing release direction under the load in the normal direction of the teeth of the inner teeth 34. Therefore, when the lock plate 31 rotates, the engagement end portion 32 c of each pole 32 is slid so as to slide on the inner teeth 34 of the support member 23. The movement of each pole 32 at this time is indicated by a solid line and a virtual line. It is also indicated by a wavy arrow.
 <回転制御装置21の作用(シート1の重力による影響)>
 図22、23は、操作ハンドル20の押し下げ操作による上述のようなシート下降方向へのピニオンギヤ18の回転に対し、シートクッション2に加わる重力によるピニオンギヤ18のシート下降方向への回転が上回るときの状態を示す。即ち、操作ハンドル20の押し下げ操作量よりもピニオンギヤ18の回転移動量が上回る状態を示す。このとき、送り爪52による回転伝達プレート36の回転は継続しているため、各送り爪52の状態は、図22のように、図20の状態と同様とされている。一方、ロックプレート31は、回転伝達プレート36により回転されず、回転軸22により回転される。
<Operation of Rotation Control Device 21 (Influence by Gravity of Sheet 1)>
22 and 23 show a state in which the rotation of the pinion gear 18 in the seat lowering direction due to the gravity applied to the seat cushion 2 exceeds the rotation of the pinion gear 18 in the seat lowering direction as described above due to the pressing operation of the operation handle 20. Indicates. That is, the rotational movement amount of the pinion gear 18 is greater than the amount by which the operation handle 20 is pushed down. At this time, since the rotation transmission plate 36 continues to rotate by the feed claws 52, the state of each feed claw 52 is the same as the state of FIG. 20 as shown in FIG. On the other hand, the lock plate 31 is not rotated by the rotation transmission plate 36 but is rotated by the rotation shaft 22.
 そのため、図23のように、係合孔36aによる各ポール33の揺動状態は解除されて、各ポール33が支持部材23の内歯34に噛合して、ロックプレート31の下降方向への回転をロックした状態となる。よって、操作ハンドル20の押し下げ操作の途中で、シートクッション2が、そこに加わる重力により下降してしまうこと(滑ること)は防止される。このように、回転伝達プレート36は、ロックプレート31に対して係合孔36bが係合する位置まで押し回されることで当該方向の回転を止める各ポール33を支持部材23の内歯34との噛合から押し外す各係合孔36aと、回転伝達プレート36を介したロックプレート31の送り回転が止められた際にピニオンギヤ18から送り回転を更に進行させる方向の逆入力があった場合にロックプレート31の回転の進行により各係合孔36aによる当該方向の回転を止める各ポール33の押し外し状態を解くキャンセル構造Cと、を有する構成とされている。なお、この状態で各ポール33がロックプレート31の下降方向への回転をロックする作動が遅れてシートクッション2が重力により下降してしまうことを防止するため、回転軸22の回転にある程度のブレーキを効かせて、回転軸22がシート1の重力により回転されるのを抑制することは望ましい。 Therefore, as shown in FIG. 23, the swinging state of each pole 33 by the engagement hole 36a is released, and each pole 33 meshes with the internal teeth 34 of the support member 23, so that the lock plate 31 rotates in the downward direction. Is locked. Therefore, it is possible to prevent the seat cushion 2 from being lowered (sliding) by gravity applied to the operation handle 20 in the middle of the push-down operation. Thus, the rotation transmission plate 36 is pushed to the position where the engagement hole 36 b is engaged with the lock plate 31, so that each pole 33 that stops rotating in the direction is connected to the inner teeth 34 of the support member 23. When each of the engagement holes 36a to be pushed out of the engagement of the gears and the feed plate rotation via the rotation transmission plate 36 is stopped, the pinion gear 18 locks when there is a reverse input in the direction of further advancement of the feed rotation. The structure includes a cancel structure C that releases the push-out state of each pole 33 that stops the rotation in the direction by each engagement hole 36a as the rotation of the plate 31 proceeds. In this state, in order to prevent the seat cushion 2 from descending due to gravity due to a delay in the operation of each pole 33 locking the rotation of the lock plate 31 in the descending direction, a certain amount of braking is applied to the rotation of the rotating shaft 22. It is desirable to suppress the rotation shaft 22 from being rotated by the gravity of the sheet 1 by using the above.
 <回転制御装置21の作用(操作ハンドル20の押し下げ操作中止時)>
 図24、25は、操作ハンドル20の押し下げ操作を中止して操作ハンドル20が中立位置へ戻された状態を示す。このとき、アウタプレート41は、トーションスプリング43の付勢力により中立位置へ戻され、インナプレート53も同期して中立位置へ戻される。そのため、インナプレート53は、図24に矢印で示すように回転される。インナプレート53が中立位置へ戻されるまでの間は、後側の送り爪52は、そのピン52cがカム部材54のカム突起54aに乗り上げた状態とされる。しかし、インナプレート53が中立位置へ戻ることにより、図24のように、後側の送り爪52は、その係合端部52aが回転伝達プレート36の内歯51に噛み合った状態に戻る。一方、前側の送り爪52は、インナプレート53が中立位置へ戻されるまでの間、係合端部52aが回転伝達プレート36の内歯51上を滑るように摺動することになる。
<Operation of the rotation control device 21 (when the operation handle 20 is depressed)>
24 and 25 show a state in which the operation handle 20 has been pushed down and the operation handle 20 is returned to the neutral position. At this time, the outer plate 41 is returned to the neutral position by the urging force of the torsion spring 43, and the inner plate 53 is also returned to the neutral position in synchronization. Therefore, the inner plate 53 is rotated as indicated by an arrow in FIG. Until the inner plate 53 is returned to the neutral position, the rear feed claw 52 is in a state where the pin 52c rides on the cam projection 54a of the cam member 54. However, when the inner plate 53 returns to the neutral position, as shown in FIG. 24, the rear feed claw 52 returns to a state in which the engagement end portion 52 a is engaged with the inner teeth 51 of the rotation transmission plate 36. On the other hand, the front feed claw 52 slides so that the engagement end portion 52a slides on the inner teeth 51 of the rotation transmission plate 36 until the inner plate 53 is returned to the neutral position.
 操作ハンドル20の押し下げ操作を中止したとき、上述のように、回転伝達プレート36への送り爪52による回転駆動は解除されるため、回転伝達プレート36はトーションスプリング37の付勢力によりロックプレート31に対して中立位置に戻される。そのため、図25のように、全てのポール32、33の係合端部32c、33cが支持部材23の内歯34に噛み合った状態となり、ロックプレート31がその位置でロックされた状態となる。よって、ピニオンギヤ18も回転を停止し、シートクッション2の高さがその位置に維持される。 When the push-down operation of the operation handle 20 is stopped, as described above, the rotational drive by the feed claw 52 to the rotation transmission plate 36 is released, so that the rotation transmission plate 36 is applied to the lock plate 31 by the urging force of the torsion spring 37. On the other hand, it is returned to the neutral position. Therefore, as shown in FIG. 25, the engagement ends 32c and 33c of all the poles 32 and 33 are engaged with the internal teeth 34 of the support member 23, and the lock plate 31 is locked at that position. Therefore, the pinion gear 18 also stops rotating, and the height of the seat cushion 2 is maintained at that position.
 <回転制御装置21の作用(操作ハンドル20を引き上げ操作)>
 図26、27は、操作ハンドル20が中立位置から途中位置まで引き上げ操作された状態を示す。このとき、図26のように、アウタプレート41の回転によりインナプレート53が矢印方向に回転される。その結果、各送り爪52が同方向に移動される。そのため、後側の送り爪52の係合端部52aが回転伝達プレート36の内歯51に力を伝達して、回転伝達プレート36を矢印方向に回転する。このとき、前側の送り爪52の係合端部52aは回転伝達プレート36の内歯51と噛み合わないようにされている。即ち、この状態では、係合端部52aの歯が内歯51の歯の法線方向の荷重を受けて噛合解除方向に移動される。しかも、回転伝達プレート36の回転に伴って、前側の送り爪52のピン52cがカム部材54のカム突起54aに乗り上げて、その係合端部52aが内歯51から離れた状態とされる。
<Operation of Rotation Control Device 21 (Operation for Pulling Up the Operation Handle 20)>
26 and 27 show a state where the operation handle 20 is pulled up from the neutral position to the middle position. At this time, as shown in FIG. 26, the inner plate 53 is rotated in the direction of the arrow by the rotation of the outer plate 41. As a result, each feed claw 52 is moved in the same direction. Therefore, the engagement end portion 52a of the rear feed claw 52 transmits a force to the internal teeth 51 of the rotation transmission plate 36, and rotates the rotation transmission plate 36 in the arrow direction. At this time, the engaging end 52a of the front feed claw 52 is not engaged with the internal teeth 51 of the rotation transmission plate 36. In other words, in this state, the teeth of the engagement end 52a are moved in the meshing release direction under the load in the normal direction of the teeth of the inner teeth 51. In addition, as the rotation transmission plate 36 rotates, the pin 52 c of the front feed claw 52 rides on the cam protrusion 54 a of the cam member 54, and the engagement end 52 a is separated from the internal teeth 51.
 このようにして回転伝達プレート36が回転されると、図27のように、回転伝達プレート36の係合孔36aが各ポール32のピン32bに係合して各ポール32の係合端部32cを支持部材23の内歯34から離れた状態とする。即ち、上昇方向のロックプレート31のロック状態を解除する。その後、係合孔36bにロックプレート31の突起31dが係合すると、回転伝達プレート36の回転がロックプレート31に伝達される。そのため、図27の矢印で示すようにロックプレート31は回転して、回転軸22を回転する。その結果、ピニオンギヤ18が回転され、シート1は上昇される。このとき、各ポール33の係合端部33cは支持部材23の内歯34と噛み合わないようにされている。即ち、この状態では、係合端部33cの歯が内歯34の歯の法線方向の荷重を受けて噛合解除方向に移動される。そのため、ロックプレート31が回転すると、各ポール33の係合端部33cは支持部材23の内歯34の上で摺動されることとなる。 When the rotation transmission plate 36 is rotated in this manner, the engagement hole 36a of the rotation transmission plate 36 engages with the pin 32b of each pole 32 and the engagement end portion 32c of each pole 32 as shown in FIG. Is in a state separated from the internal teeth 34 of the support member 23. That is, the lock state of the lock plate 31 in the upward direction is released. Thereafter, when the protrusion 31 d of the lock plate 31 is engaged with the engagement hole 36 b, the rotation of the rotation transmission plate 36 is transmitted to the lock plate 31. Therefore, as shown by the arrow in FIG. 27, the lock plate 31 rotates to rotate the rotating shaft 22. As a result, the pinion gear 18 is rotated and the seat 1 is raised. At this time, the engagement end portion 33 c of each pole 33 is not engaged with the internal teeth 34 of the support member 23. That is, in this state, the teeth of the engagement end portion 33c are moved in the meshing release direction under the load in the normal direction of the teeth of the inner teeth 34. Therefore, when the lock plate 31 rotates, the engagement end portion 33 c of each pole 33 is slid on the inner teeth 34 of the support member 23.
 <回転制御装置21の作用(まとめ)>
 以上のとおり、操作ハンドル20を押し下げ操作すると、その操作に応じた量だけシート1は下降される。その押し下げ操作の繰り返しによりシート1を望みの高さに調整できる。反対に、操作ハンドル20を引き上げ操作したときも、同様に、その操作に応じた量だけシート1は上昇される。その引き上げ操作の繰り返しによりシート1を望みの高さに調整できる。以上の操作によりシート1が下限位置又は上限位置に達すると、図28又は図29のように回転軸22のそれ以上の回転が止められる。
<Operation (Summary) of Rotation Control Device 21>
As described above, when the operation handle 20 is pushed down, the seat 1 is lowered by an amount corresponding to the operation. The sheet 1 can be adjusted to a desired height by repeating the pressing operation. On the contrary, when the operation handle 20 is pulled up, similarly, the seat 1 is raised by an amount corresponding to the operation. The sheet 1 can be adjusted to a desired height by repeating the lifting operation. When the sheet 1 reaches the lower limit position or the upper limit position by the above operation, the rotation of the rotation shaft 22 is stopped as shown in FIG.
 以上をまとめると、本実施例のリフタ装置10は、次のような構成とされている。すなわち、リフタ装置(10)は、シート(1)を昇降動作させるリンク機構(12)の入力ギヤ(16)に噛合するピニオンギヤ(18)と、シート(1)を昇降動作させる際に対応する回転方向に操作される操作ハンドル(20)とピニオンギヤ(18)との間を繋ぐように配置されてピニオンギヤ(18)の回転を制御する回転制御装置(21)と、ピニオンギヤ(18)を回転可能に支持するベース(23)と、を備える。 In summary, the lifter device 10 of this embodiment is configured as follows. That is, the lifter device (10) has a pinion gear (18) that meshes with the input gear (16) of the link mechanism (12) that moves the seat (1) up and down, and a rotation that corresponds to when the seat (1) moves up and down. A rotation control device (21) for controlling the rotation of the pinion gear (18) disposed so as to connect the operation handle (20) operated in the direction and the pinion gear (18), and the pinion gear (18) being rotatable And a supporting base (23).
 回転制御装置(21)は、操作ハンドル(20)に結合されて操作ハンドル(20)の回転操作によりピニオンギヤ(18)の回転軸線まわりに回される入力部材(N)と、入力部材(N)とピニオンギヤ(18)とに連結されて入力部材(N)の回転をピニオンギヤ(18)に送り回転として伝達する送り部(A)と、送り部(A)により送り回転されたピニオンギヤ(18)の回転をベース(23)に対して止めるロック部(B)と、を有する。 The rotation control device (21) is coupled to the operation handle (20) and is rotated around the rotation axis of the pinion gear (18) by the rotation operation of the operation handle (20), and the input member (N) And a pinion gear (18) connected to the pinion gear (18) to transmit the rotation of the input member (N) to the pinion gear (18) as a feed rotation, and a pinion gear (18) fed and rotated by the feed portion (A). And a lock portion (B) for stopping rotation with respect to the base (23).
 送り部(A)は、入力部材(N)に設けられる送りポール(52)と、送りポール(52)が付勢された状態で噛合されることで入力部材(N)と一体的に回転するインターナルギヤ(36)と、ピニオンギヤ(18)と回転方向において一体的に連結され且つインターナルギヤ(36)に設けられる係合部(36b)との係合によりインターナルギヤ(36)と一体的に回転する回転部材(31)と、を有する。 The feed portion (A) rotates integrally with the input member (N) by meshing with the feed pole (52) provided on the input member (N) while the feed pole (52) is biased. The internal gear (36) and the pinion gear (18) are integrally coupled with each other in the rotational direction and are engaged with an engaging portion (36b) provided on the internal gear (36) to be integrated with the internal gear (36). And a rotating member (31) that automatically rotates.
 ロック部(B)は、回転部材(31)に設けられてベース(23)に形成されたベースギヤ(34)に対して付勢された状態で噛合されることで回転部材(31)の回転を止める複数のロックポール(32、33)を有する。送りポール(52)及びロックポール(32、33)が、入力部材(N)から一方向の回転が入力されたときにはそれぞれの噛合対象に動力伝達可能に噛合し、入力部材(N)から他方向の回転が入力されたときにはそれぞれの噛合対象に動力伝達不能であるように噛合が解除される、一対の互いに対称向きに機能するラチェット式の噛合構造を有する。 The locking part (B) is provided on the rotating member (31) and meshed with the base gear (34) formed on the base (23) in a biased state, thereby rotating the rotating member (31). It has a plurality of lock poles (32, 33) for stopping. When the feed pole (52) and the lock pole (32, 33) receive rotation in one direction from the input member (N), the feed pole (52) and the lock pole (32, 33) mesh with each meshing object so that power can be transmitted, and the input member (N) from the other direction. When a rotation is input, a pair of ratchet-type meshing structures functioning symmetrically with each other are released so that power transmission to each meshing object is impossible.
 インターナルギヤ(36)は、回転部材(31)に係合部(36b)が係合するまで下降方向に回されることで複数のロックポール(32、33)のうちの下降方向への回転部材(31)の回転を止めるための一部のロックポール(33)と、ベースギヤ(34)と、の噛合を解除するロック解除部(36a)を有する。更に、インターナルギヤ(36)は、インターナルギヤ(36)を介した回転部材(31)の送り回転が止められた場合においてピニオンギヤ(18)から送り回転を更に進行させる方向の逆入力があったとき、その逆入力による回転部材(31)の回転の進行により、ロック解除部(36a)による一部のロックポール(33)とベースギヤ(34)との噛合の解除を中止するキャンセル構造(C)を有する。 The internal gear (36) is rotated in the downward direction until the engaging portion (36b) is engaged with the rotating member (31), so that the plurality of lock poles (32, 33) rotate in the downward direction. It has a lock release part (36a) which cancels | releases a part of lock pole (33) for stopping rotation of a member (31), and a base gear (34). Further, the internal gear (36) has a reverse input in the direction in which the feed rotation further proceeds from the pinion gear (18) when the feed rotation of the rotating member (31) through the internal gear (36) is stopped. When the rotation of the rotating member (31) due to the reverse input occurs, the cancel structure (C) cancels the release of the engagement between the lock gear (33) and the base gear (34) by the unlocking portion (36a). ).
 このような構成とされていることにより、操作ハンドル(20)の回転操作により送り部(A)を介してピニオンギヤ(18)をシート(1)の下降方向に回転させた際、ピニオンギヤ(18)からシート(1)の重力作用に伴う送り回転を更に進行させる方向の逆入力があった場合、その逆入力によって回転部材(31)の回転が更に進行することにより、ロックポール(33)とインターナルギヤ(36)との噛合の解除(即ち、ロック解除部(36a)の働きにより、回転部材(31)が回転可能となっている状態)がキャンセルされ、ロックポール(33)がベースギヤ(34)に噛合される。その結果、回転部材(31)の更なる回転(即ち、逆入力に起因する滑り)が抑制される。このように、上記構成により、ピニオンギヤ(18)と一体を成す回転部材(31)に設けられたロックポール(32、33)のベースギヤ(34)に対する送り回転方向の滑り(ひいては、座面高さの滑り)を、適切に規制できる。 With such a configuration, when the pinion gear (18) is rotated in the descending direction of the seat (1) via the feed portion (A) by the rotation operation of the operation handle (20), the pinion gear (18) When there is a reverse input in the direction in which the feed rotation accompanying the gravity action of the seat (1) further advances, the rotation of the rotating member (31) further advances due to the reverse input, so that the lock pole (33) Release of engagement with the null gear (36) (that is, a state in which the rotating member (31) is rotatable by the action of the lock releasing portion (36a)) is canceled, and the lock pole (33) is moved to the base gear (34). ). As a result, further rotation of the rotating member (31) (that is, slippage due to reverse input) is suppressed. Thus, according to the above configuration, the slip in the feed rotation direction with respect to the base gear (34) of the lock poles (32, 33) provided on the rotating member (31) integrated with the pinion gear (18) (and the seat surface height). Can be controlled appropriately.
 また、本実施例では、インターナルギヤ(36)とベースギヤ(34)とが、互いに同数の歯数を持つ内歯車を有する。このような構成とされていることにより、操作ハンドル(20)の回転操作に伴うインターナルギヤ(36)の送り回転量に対して、ピニオンギヤ(18)をロスなく効率的に送り回転させることができる。 In this embodiment, the internal gear (36) and the base gear (34) have internal gears having the same number of teeth. With such a configuration, the pinion gear (18) can be efficiently fed and rotated without loss with respect to the feed rotation amount of the internal gear (36) accompanying the rotation operation of the operation handle (20). it can.
 <他の実施形態>
 以上、特定の実施形態について説明したが、本発明は、それらの外観、構成に限定されず、種々の変更、追加、削除が可能である。例えば、上記実施形態では、本発明を自動車のシートに適用したが、飛行機、船、電車等の乗物に搭載のシート、若しくは映画館等に設置のシートに適用しても良い。
<Other embodiments>
As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible. For example, in the above-described embodiment, the present invention is applied to an automobile seat, but may be applied to a seat mounted on a vehicle such as an airplane, a ship, or a train, or a seat installed in a movie theater.
 また、上記実施形態では、回転部材31から突出する突起31eがインターナルギヤ36に設けられる係合部としての係合孔36b内に挿入されて、回転部材31が突起31eと係合孔36bとの係合によりインターナルギヤ36と一体的となって回転するようになっている。しかし、リフタ装置は、インターナルギヤ36から突出する係合部としての突起が回転部材31に設けられる係合孔内に挿入されて、回転部材31が上記突起と係合孔との係合によりインターナルギヤ36と一体的となって回転するように構成されてもよい。このような構成であっても、ピニオンギヤ18から送り回転を更に進行させる方向の逆入力があった場合、回転部材31の回転の進行によりロック解除部36aによるロックポール32、33のうちの当該方向の回転を止める側のロックポールの解除を中止するキャンセル構造Cを構成できる。 Moreover, in the said embodiment, the protrusion 31e which protrudes from the rotation member 31 is inserted in the engagement hole 36b as an engaging part provided in the internal gear 36, and the rotation member 31 is the protrusion 31e, the engagement hole 36b, and Is engaged with the internal gear 36 to rotate. However, in the lifter device, a protrusion as an engaging portion protruding from the internal gear 36 is inserted into an engaging hole provided in the rotating member 31, and the rotating member 31 is engaged by the engagement between the protrusion and the engaging hole. It may be configured to rotate integrally with the internal gear 36. Even in such a configuration, when there is a reverse input in the direction in which the feed rotation further proceeds from the pinion gear 18, the direction of the lock poles 32 and 33 by the lock release portion 36 a due to the progress of the rotation of the rotating member 31. The cancel structure C can be configured to stop the release of the lock pole on the side where the rotation is stopped.
 また、インターナルギヤ36とベースギヤ34とは、互いに相手側の整数倍の歯数を持つ内歯車を有してもよい。 Further, the internal gear 36 and the base gear 34 may have an internal gear having a number of teeth that is an integral multiple of the other side.
 本出願は、2018年4月27日出願の日本特許出願(特願2018-086132)に基づくものであり、それらの内容はここに参照として取り込まれる。 This application is based on a Japanese patent application (Japanese Patent Application No. 2018-086132) filed on Apr. 27, 2018, the contents of which are incorporated herein by reference.
 本発明のリフタ装置によれば、例えば、シートの座面高さを下げた際の座面高さの滑りを抑制可能である。この効果を奏する本発明は、例えば、自動車などのシートに関して有用である。 According to the lifter device of the present invention, for example, it is possible to suppress the sliding of the seating surface height when the seating surface height of the seat is lowered. The present invention exhibiting this effect is useful, for example, for a seat such as an automobile.
 1   自動車用シート(シート)
 2   シートクッション
 3   シートバック
 4   フロア
 5   ロアレール
 6   アッパレール
 7   ブラケット
 8   シートスライド装置
 10  リフタ装置
 11  リンク部材
 11a 前方リンク
 11b 後方リンク
 12  リンク機構
 13  サイドフレーム
 13a 貫通孔
 14  ベース部材
 16  セクタギヤ(入力ギヤ)
 17  トルクロッド
 18  ピニオンギヤ
 20  操作ハンドル
 21  回転制御装置
 22  回転軸
 22a 外周面
 22b、22c スプライン
 23  支持部材(ベース)
 23a 貫通孔
 23b 案内凹部
 23c 中心孔
 24  カバー
 24a 開口部
 24b 係合片
 24c 突片
 24d 脚部
 24e 貫通孔
 25  軸部材
 25a スプライン穴
 25b 突出ピン
 25c フランジ部
 31  ロックプレート(回転部材)
 31a 摺動面部
 31b スプライン孔
 31c 長孔
 31d、31e 突起
 32、33 ポール(ロックポール)
 32a、33a 貫通孔
 32b、33b ピン
 32c、33c 係合端部
 34  内歯(ベースギヤ)
 35  トーションスプリング
 35a 巻回部
 35b 端部
 36  回転伝達プレート(インターナルギヤ)
 36a 係合孔(ロック解除部)
 36b 係合孔(係合部)
 36c 長孔
 36d 中心孔
 37  トーションスプリング
 37a 端部
 41  アウタプレート
 41a 貫通孔
 41b 中心孔
 42  係合片
 43  トーションスプリング
 43a 端部
 51  内歯
 52  送り爪(送りポール)
 52a 係合端部
 52b ヒンジ部
 52c ピン
 52d 突部
 53  インナプレート
 53a アーム
 53b 貫通孔
 53c 係合孔
 53d 中心孔
 54  カム部材
 54a カム突起
 54b ピン
 55  トーションスプリング
 55a 端部
 55b 突起
 60  ストッパ
 61  支持部材側突部
 62  係合片
 63  回転軸側突部
 α   成す角
 β   成す角
 C   キャンセル構造
 A   送り部
 B   ロック部
 N   入力部材
 W   溶接部
1 Car seat (seat)
2 Seat cushion 3 Seat back 4 Floor 5 Lower rail 6 Upper rail 7 Bracket 8 Seat slide device 10 Lifter device 11 Link member 11a Front link 11b Rear link 12 Link mechanism 13 Side frame 13a Through hole 14 Base member 16 Sector gear (input gear)
17 Torque rod 18 Pinion gear 20 Operation handle 21 Rotation control device 22 Rotating shaft 22a Outer peripheral surface 22b, 22c Spline 23 Support member (base)
23a Through hole 23b Guide recess 23c Center hole 24 Cover 24a Opening 24b Engagement piece 24c Projection piece 24d Leg part 24e Through hole 25 Shaft member 25a Spline hole 25b Projection pin 25c Flange part 31 Lock plate (Rotating member)
31a Sliding surface part 31b Spline hole 31c Long hole 31d, 31e Protrusion 32, 33 Pole (lock pole)
32a, 33a Through hole 32b, 33b Pin 32c, 33c Engagement end 34 Internal tooth (base gear)
35 Torsion spring 35a Winding part 35b End 36 Rotation transmission plate (internal gear)
36a engagement hole (lock release part)
36b engagement hole (engagement part)
36c long hole 36d center hole 37 torsion spring 37a end 41 outer plate 41a through hole 41b center hole 42 engagement piece 43 torsion spring 43a end 51 internal teeth 52 feed claw (feed pole)
52a engagement end 52b hinge 52c pin 52d projection 53 inner plate 53a arm 53b through hole 53c engagement hole 53d center hole 54 cam member 54a cam projection 54b pin 55 torsion spring 55a end 55b projection 60 stopper 61 support member side Projection 62 Engagement piece 63 Rotating shaft side projection α Angle formed β Angle formed C Cancellation structure A Feed section B Lock section N Input member W Welded section

Claims (2)

  1.  シートを昇降動作させるリンク機構の入力ギヤに噛合するピニオンギヤと、
     シートを昇降動作させる際に対応する回転方向に操作される操作ハンドルと前記ピニオンギヤとの間を繋ぐように配置されて前記ピニオンギヤの回転を制御する回転制御装置と、
     前記ピニオンギヤを回転可能に支持するベースと、を備えるリフタ装置であって、
     前記回転制御装置が、
     前記操作ハンドルに結合されて前記操作ハンドルの回転操作により前記ピニオンギヤの回転軸線まわりに回される入力部材と、
     前記入力部材と前記ピニオンギヤとに連結されて前記入力部材の回転を前記ピニオンギヤに送り回転として伝達する送り部と、
     前記送り部により送り回転された前記ピニオンギヤの回転を前記ベースに対して止めるロック部と、を有し、
     前記送り部が、
     前記入力部材に設けられる送りポールと、前記送りポールが付勢された状態で噛合されることで前記入力部材と一体的に回転するインターナルギヤと、前記ピニオンギヤと前記回転方向において一体的に連結され且つ前記インターナルギヤに設けられる係合部との係合により前記インターナルギヤと一体的に回転する回転部材と、を有し、
     前記ロック部が、
     前記回転部材に設けられて前記ベースに形成されたベースギヤに対して付勢された状態で噛合されることで前記回転部材の回転を止める複数のロックポールを有し、
     前記送りポール及び前記ロックポールが、
     前記入力部材から一方向の回転が入力されたときにはそれぞれの噛合対象に動力伝達可能に噛合し、前記入力部材から他方向の回転が入力されたときにはそれぞれの前記噛合対象に動力伝達不能であるように噛合が解除される、一対の互いに対称向きに機能するラチェット式の噛合構造を有し、
     前記インターナルギヤが、
     前記回転部材に前記係合部が係合するまで前記一方向及び前記他方向のどちらかの操作方向に回されることで、前記複数の前記ロックポールのうちの前記操作方向への前記回転部材の回転を止めるための一部の前記ロックポールと、前記ベースギヤと、の噛合を解除するロック解除部と、
     当該インターナルギヤを介した前記回転部材の送り回転が止められた場合において前記ピニオンギヤから送り回転を更に進行させる方向の逆入力があったとき、前記逆入力による前記回転部材の回転の進行により、前記ロック解除部による前記一部の前記ロックポールと前記ベースギヤとの噛合の解除を中止するキャンセル構造と、を有する、
     リフタ装置。
    A pinion gear meshing with an input gear of a link mechanism that moves the seat up and down;
    A rotation control device that is arranged so as to connect between an operation handle that is operated in a corresponding rotation direction when the seat is moved up and down and the pinion gear, and that controls the rotation of the pinion gear;
    A lifter device comprising a base that rotatably supports the pinion gear,
    The rotation control device is
    An input member coupled to the operation handle and rotated about a rotation axis of the pinion gear by a rotation operation of the operation handle;
    A feed unit coupled to the input member and the pinion gear to transmit the rotation of the input member to the pinion gear as a feed rotation;
    A lock portion that stops rotation of the pinion gear that is fed and rotated by the feed portion with respect to the base;
    The feeding part is
    A feed pole provided on the input member, an internal gear that rotates integrally with the input member by meshing with the feed pole being biased, and a pinion gear that is integrally connected in the rotational direction And a rotating member that rotates integrally with the internal gear by engagement with an engaging portion provided on the internal gear,
    The lock part is
    A plurality of lock poles that stop the rotation of the rotating member by being meshed in a state of being biased with respect to a base gear that is provided on the rotating member and formed on the base;
    The feed pole and the lock pole are
    When a rotation in one direction is input from the input member, it engages with each meshing object so that power can be transmitted. When a rotation in the other direction is input from the input member, power cannot be transmitted to each meshing object. Having a ratchet type meshing structure that functions in a pair of symmetrical directions, the meshing being released to each other,
    The internal gear is
    The rotating member in the operating direction among the plurality of lock poles is rotated in one of the one direction and the other direction until the engaging portion is engaged with the rotating member. A part of the lock pole for stopping the rotation of the base and the lock release part for releasing the meshing with the base gear,
    When the feed rotation of the rotating member via the internal gear is stopped, when there is a reverse input in the direction of further advancement of the feed rotation from the pinion gear, due to the progress of the rotation of the rotating member by the reverse input, A cancel structure for stopping the release of the engagement between the part of the lock pole and the base gear by the lock release unit,
    Lifter device.
  2.  請求項1に記載のリフタ装置において、
     前記インターナルギヤと前記ベースギヤとが、互いに同数の歯数又は相手側の整数倍の歯数を持つ内歯車を有する、
     リフタ装置。
    The lifter device according to claim 1,
    The internal gear and the base gear have internal gears having the same number of teeth or an integral multiple of the other side.
    Lifter device.
PCT/JP2019/017817 2018-04-27 2019-04-25 Lifter device WO2019208742A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018086132A JP2019189129A (en) 2018-04-27 2018-04-27 Lifter device
JP2018-086132 2018-04-27

Publications (1)

Publication Number Publication Date
WO2019208742A1 true WO2019208742A1 (en) 2019-10-31

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ID=68294040

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Application Number Title Priority Date Filing Date
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WO (1) WO2019208742A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012158301A (en) * 2011-02-02 2012-08-23 Aisin Seiki Co Ltd Seat lifter system for vehicle
JP2016078850A (en) * 2014-10-16 2016-05-16 株式会社デルタツーリング Turning force transmission control mechanism and seat structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012158301A (en) * 2011-02-02 2012-08-23 Aisin Seiki Co Ltd Seat lifter system for vehicle
JP2016078850A (en) * 2014-10-16 2016-05-16 株式会社デルタツーリング Turning force transmission control mechanism and seat structure

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